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70 Coronet R/T refresh

Stereolab42

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Follow-on from my thread in the Welcome section. Here is the 70 Coronet R/T I just bought:

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1970_dodge_coronet_r-t_2_door_hardtop_b50b78d339.jpg
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I'll repro what the fender tag decoded as here:

===================================
WS23:
Dodge Coronet,Charger
Special, R/T
2 Door Hardtop
U0A: 440 375HP 1-4BBL 8 CYL
1970
Lynch Road, MI, USA
109628: Sequence number
E86: 440 cid 4 barrel V8 (High Performance) 375hp
D32: Heavy Duty Automatic Transmission
EF8: Dark Green Metallic (Dodge), Ivy Green Metallic (Plymouth) Exterior Color
D6F8: Trim - Luxury, Vinyl Bucket Seats, Green
EF8: Dark Green Metallic (Dodge), Ivy Green Metallic (Plymouth) Int. Door Frames
826: Build Date: August 26
065295: Order number
V1F: Full Vinyl Top, Green
N96: Fresh Air Hood
M46: Simulated ¼ Scoops
===================================​

Some facts about the car:

  • Almost certainly a Cali car all its life. This underwent a full resto in the 2000s and I have some pics. There was literally no rust of consequence on the original body panels.
  • Engine block is definitely numbers-matching. I'm told it was bored 0.030 over during the rebuild.
  • Transmission is allegedly original internally but the case was replaced due to a crack. Oh well. This gives me an excuse to throw in an overdrive trans if I want to someday.
  • Exterior color is NOT the original Mopar metallic green, but a darker metallic green (I'm trying to get the paint code, allegedly it's a GM). The black stripes are metallic black and are painted on.
  • Vinyl roof and interior are now black, but were originally green.
  • Other than the colors, the wheels, and the radiator, it seems effort was made to keep the car original. Even the original front disc brakes are still there.
So. What's my goal and philosophy with this car? I like to go with "practical originality" -- stick with OEM except where inadvisable due to safety concerns. The car varies from the near-flawless (like the paint) to the rough (much of the interior and electrical). I want to gradually upgrade everything to at least "excellent" status over the next couple of years.

To that end I want to create a to-do list. I'll try to consolidate my questions in this thread. I'm sure there will be many!

To-do 9/29/2018
  • Perform a full detail at some point.
  • Fix small paint bubble near rear window trim. (It's not rust, maybe bad surface prep. Inject glue?)
  • A few exterior plastic pieces are somewhat tired and should be replaced.
  • The center of the hood doesn't quite lineup properly with the bumper. Resolve this.
  • Replace hopelessly pitted driver's side remote mirror.
  • Replace hopelessly pitted vent window brightwork (ugh, working with vent windows SUCKS, I know this from my GTO).
  • Replace wheels and tires with something more period-correct.
  • No spare came with the car. Source spare-tire hardware.
  • Replace all fluids in the car so I have a fresh starting point.
  • The Wizard radiator has a leak and will be trashed. Get a new one (another Wizard? An OEM Mopar repro that doesn't suck, if such a thing exists?)
  • Touchup some paint on the engine.
  • Replace some of the things in the engine bay that should be shiny but won't cleanup.
  • Transmission and oil pan gaskets have slow seepage. Replace the gaskets.
  • Replace the Magnaflow mufflers with my favorites, the Flowmaster Super-40s.
  • An exhaust pipe is pressing up against the floorboards and causing vibration. Fix that.
  • Decide if I want to add QTP exhaust cutouts so I can dump headers at will.
  • Replace busted rearview mirror.
  • Fix bad sun visor ball joints.
  • Replace the tired steering wheel and horn cap with OEM repros (for an absolute fortune, but they are in disastrous shape).
  • Fix the broken horn.
  • Fix the broken autocancel on the turn signal.
  • Wood veneer trim in the car is mismatched and mostly tired. Replace as needed.
  • Diagnose and fix non-working fuel gauge.
  • Alternator gauge reads backwards. Fix it.
  • Diagnose and fix non-working blower (and maybe heater core?).
  • Diagnose and fix non-working wipers.
  • Replace incorrect and tired armrests.
  • Restore or replace the janky glovebox.
  • Dash pad is in good shape, but the metal area in back of it needs repainting or major touchup? Do this.
  • Replace various tired interior switches, knobs, and other misc pieces.
  • Right quarter window doesn't go up all the way. Fix.
  • Clean or polish out old stains/scratches in side windows.
  • PO added a thing under the dash to hold an aftermarket radio, along with kick-panel speakers. Replace all this with more modern hardware.
  • Replace front seatbelts with 3-point seatbelts.
  • Replace rear lap seatbelts with new lap seatbelts.
  • Install a Lojack.
  • Get personalized black Cali plates.
 
Last edited:
I guess the first question to ask is that I'm super-OCD about paint, and the only non-trivial flaw is this small bubble near the rear trim:

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It's almost certainly due to bad surface prep and not rust. I've read some people inject these bubbles with glue and press them down. Will that work here? I have a paint guy who can blend portions of panels but metallic is tough and that has to be a last resort. I don't want to leave it alone because I fear it could be ripped open during a detail, or possibly "grow".
 
Wow.....beautiful car. If you don't mind me asking, how much did that car set you back?
 
Wow.....beautiful car. If you don't mind me asking, how much did that car set you back?

Thanks. Would rather not post that in this thread but glad to PM anyone who is curious. I probably overpaid but I had very specific requirements for what I was looking for and this pushed all the right buttons (69-72 Mopar muscle with the aggressive-style grills, a 440, not black, great paint, great mechanicals, and local only).
 
Thinking more about wheels... the fender tag doesn't include any wheel options. Given that, is it possible to say for certain what wheels the car would have come with? Would it have been the body-colored steelies with the red circle center caps? Or is it impossible to tell without seeing the (long-gone) build sheet?
 
Usually a love it or hate it front mug - glad another lover surfaced - great R/T!

Is it my eyes or is the bottom green-tinted rhino lining?

On the wheels, one partial trick (when it hasn't been repainted) is to look under the decklid at the spare factory mark: "F70" (x14) or "F60" (= 15" rallyes). Not having the broadcast sheet it would be a guess on which 14s, but one assumption is that someone ordering this low-option R/T wouldn't spend the extra money on rallyes or magnums. You'll never know, but that means no wrong answer in the period rollers you choose. Since you don't know the GM paint, I wonder how black steelies with dishes would look matching the black side scoops/top/stripe?

Very thorough to do list - couple ideas:
Radiator: GlenRay is correct and quality IMO
Jack: you need 1104 hook and Tbar mast, good luck with that. Pics@ nicksgarage.com.
3 point: if you're talking modern self-retracting, I've seen adaptors for E-bodies, don't think they can be used in B-bodies as bolt-in.
 
Not to rain too much on your parade, but that corner by the rear windscreen is a very rust prone area and is where they usually start.

I agree, super car and in great shape.

I'd see if a local paint shop can photo match the color, and then see what's under that bubble.

I've had really good luck getting an exact match from out local shop, even with some hard to match colors.
 
Beautiful R/T. I love 70' Coronets/Super Bees. Most people hate them. They are definitely a love/hate type of car. To me it is the 71' Road Runner/GTXs that I do not like the front end on. Most people do like those though. I will add a 70' Coronet or Super bee to my 1970' fleet someday.
 
Nice ride!

The paint issue you have looks like the molding was not removed when they painted the car. Looks like material build up then tape removal. Or, the molding was installed too tight before the paint hardened and it moved the paint around. I don't see a rust issue.

I order to fix that you will need to remove the molding and pull back the vinyl top. Once it's all pulled back plan on sanding, priming, blending then clearing the entire quarter. Hopefully ending at the Dutchman panel seam. Chances are your blend line will look similar to the problem you have now if they build up too much material.
 
Usually a love it or hate it front mug - glad another lover surfaced - great R/T!

Is it my eyes or is the bottom green-tinted rhino lining?

On the wheels, one partial trick (when it hasn't been repainted) is to look under the decklid at the spare factory mark: "F70" (x14) or "F60" (= 15" rallyes). Not having the broadcast sheet it would be a guess on which 14s, but one assumption is that someone ordering this low-option R/T wouldn't spend the extra money on rallyes or magnums. You'll never know, but that means no wrong answer in the period rollers you choose. Since you don't know the GM paint, I wonder how black steelies with dishes would look matching the black side scoops/top/stripe?

Very thorough to do list - couple ideas:
Radiator: GlenRay is correct and quality IMO
Jack: you need 1104 hook and Tbar mast, good luck with that. Pics@ nicksgarage.com.
3 point: if you're talking modern self-retracting, I've seen adaptors for E-bodies, don't think they can be used in B-bodies as bolt-in.

Thanks. I've been spending some time looking at vintage ads and current resto pics of other 1970 R/Ts and comparing them to my own... aside from the paint being non-Mopar (I've actually gotten the GM paint code from the PO, it's "medium green metallic"), the bumper center, side scoops, and ram scoops should be body color instead of black. It is what it is, but I like your idea of black wheels to match those elements. One interesting thing... all of the vintage pics I saw had whitewall tires, but it seems people are mostly using redlines these days. Have to make a decision there.

The repro GlenRay radiators look very sharp, but I chose to go the easiest path here and just order another Wizard. I don't know what, if any, mods might have been made to accommodate the Wizard that might interfere with install of a stock radiator.

Seatbeltsplus.com had 3-point Mopar-style belts, I ordered some of those.

I take final delivery of the car tomorrow morning. So excited! While I await the delivery of the new radiator my first priority will be to get the fuel gauge working. I'm very comfortable with electrical work so I should be able to diagnose this quickly. I pre-ordered a couple plausible parts that could have failed so I should have this wrapped up by the weekend.
 
Nice ride!

The paint issue you have looks like the molding was not removed when they painted the car. Looks like material build up then tape removal. Or, the molding was installed too tight before the paint hardened and it moved the paint around. I don't see a rust issue.

I order to fix that you will need to remove the molding and pull back the vinyl top. Once it's all pulled back plan on sanding, priming, blending then clearing the entire quarter. Hopefully ending at the Dutchman panel seam. Chances are your blend line will look similar to the problem you have now if they build up too much material.

Yikes. I think that will be Plan B. I just got some hobbyist syringes and some glue. Plan A is to make a small incision with an x-acto knife, insert syringe toward back of bubble, and deploy glue while slowly removing syringe and pressing out the bubble. If this somehow fails spectacularly I can always sand out the bubble and hit it with touchup while I await a better fix.
 
I was smoking crack. The bubble is not hollow but just paint over material buildup (good call 69L). It's really small and hard to see so I'll just leave it be. But I found out why my brakes are kinda spongy:

20181004_223744.jpg


Jesus wept. I ordered a proper reman 2944477 on ebay (none of that Cardone crap). Should I replace the brake booster too while I'm "in there" or leave that be?
 
If you think there's a problem with it take car of it now. If it's original send it out to Booster Dewey. Very reasonable price and fast turn around.
 
I was smoking crack. The bubble is not hollow but just paint over material buildup (good call 69L). It's really small and hard to see so I'll just leave it be. But I found out why my brakes are kinda spongy:

View attachment 663617

Jesus wept. I ordered a proper reman 2944477 on ebay (none of that Cardone crap). Should I replace the brake booster too while I'm "in there" or leave that be?
good grief man , if it were me I would go through the entire brake system . I imagine the calipers probably look a like that too.
 
good grief man , if it were me I would go through the entire brake system . I imagine the calipers probably look a like that too.

The brakes actually look good from the outside, however I will have my mechanic take a closer look next week. I decided to go with a new Wilwood MC since I went all-Wilwood on my GTO and their stuff is superb. Car is going in on Monday so they can change all fluids, swap the MC, and swap the radiator.

So the instrument cluster is in bad shape in numerous ways, and the general area behind there is a disaster. I can't patch things up just twiddling on it from behind on my back. I figure I'm going to pull it and have it over a couple months. I assume the car will drive without the cluster installed, caveman style... I know my GTO did. :)
 
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Man this dash is a disaster. Literally the only thing the PO restored were the guts of the five gauges (even the clock works). Everything else needs to be cleaned, replaced, repainted, or dealt with in some manner. The heater box needs to come out too but that will wait until the dash is done (from what I read it can come out independently of the dash). I will be driving without an instrument cluster for a while it seems.

There is a lot of ancient crumbling insulation in the back. I assume I can just rip it out?

Also, my fuel sender seems bad, if I measure the ohms on the blue wire in the dash (which is the sender wire) to ground, I get 74 ohms. Tank is definitely full, so it should instead be close to 10 ohms. Luckily I have a new sender and that will be another thing the mechanic will replace.
 
Yay I replaced my first part! Goodbye old busted rearview mirror:

20181007_183820.jpg


  • I've begun compiling a shopping list of parts and am getting quite a shock. On my GTO, literally EVERYTHING was reproduced, and was just a mouse click away on opgi.com. On this car, however, about half of what I want is not, and you have to get creative.
  • I think I'm going to bite the bullet and replace the dash wiring harness. YearOne has a near-identical repro for a decent price. I'm not sure yet if any of the non-working electrical stuff is due to old wiring, but replacing that old crap will rule that out for sure. It's also a "now or never" moment.
  • As for the heater box there is zero chance I'm going to rebuild that myself. Will send it out to one of those rebuild services in a couple months, I suppose.
 
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