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70 GTX history and project

adamst56

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Apr 20, 2010
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Location
Houston
I have recently finished a 70GTX that has been work-in-progress for amost 2 years.
I will section the story out to hopefully make it less painful for those that don't care to get through it. With a lot of pictures...
I will back up beyond my history to what I have found out about the car -
History of My GTX
Compiled from what the seller (4th owner) told me, and calls to the 2nd and 3rd owners
October 1969: Sold new from Stone Mountain Chrysler Plymouth
Don’t know the original owners name but the 2nd owner told me the original owner was a senior in high school when he bought the car. He was going off to a college that did not allow freshmen to have cars on campus so he sold it to Mike.

Summer 1970: Mike bought the car for $2500 with 7500 miles on it.
Mike worked as a mechanic in the Atlanta area. Later he had jobs in the Atlanta area with Lunati Cams and with a company that made cranks for race motors. He was of the “street racing generation”. He drove the car for a while with the 440 in it. Subsequently he pulled the motor and stuck in stroked 426 (523cu.in.) and put in an automatic transmission. He said the original gears must have been changed by the previous owner from the 3:54 to 4:11. He wasn’t sure why or when but it had a 4:11 when he got it. He wanted to go 4:56 so he pulled the Dana and put in the 8-3/4” that was in it when I bought it.
Mike sold the original block as a rebuilt race motor to someone in Marietta GA. He knows the motor threw a rod and the block was junked somewhere locally.
Mike had a friend that had a V-code Road Runner he was selling that had an Edelbrock Aluminum intake. The Dana 60 was sold to a guy in Memphis. Mike was a longtime friend with James, the 3rd owner.

July 1981: James bought the car with 20,000+ miles on it with no motor. He did not title it until 1982 when he put a motor in it. James said he had the original transmission but it was never in the car. It was sold at a garage sale and is long gone with no idea where. This obviously will never be a matching numbers car.
put a 400 motor in the car that was mated to the auto Mike put in it and the 8-3/4” rear end. He said he drove it about 1000 miles in the 15 years he had it before he gave it to his son. Prior to parking it behind a barn for 8 years his son drove it another 9000 miles.

pictures to follow...
 
James listed the car for sale in Hemmings in 2007:
odometer.jpg
odometer pictures confirms most of the stories on mileage
interior.jpg
Mike had put the orange inserts in the seats "to get his butt off the vinyl" and because the "white got dirty if you looked at it".
GTX_1.jpg
top.jpg
not bad under the vinyl top
trunk.jpg
a bit of rust around the back window and trunk lip
 
2007: H.B. bought the car with 36,500 miles for $15,500.
He bought the car with the 400 cu.in. motor, auto transmission and 8-3/4” rear-end. He put the 440-6 in the car and returned it to a 4-speed. He also did some cleaning under the hood. He had some rust around the rear window repaired and the car painted. Obviously he did quite a bit of work.
His sales story that I read on Cars-On-Line that got me interested:
“Plymouth GTX . 440-6-Pack 4speed, non-matching Motor but have 3 perfect build sheets and fender tag. Core support matches and original door tag still in place ( I had them tape off when painted).
Hemi Orange, with new Black Top and new White interior. Paint is perfect and all colors are correct for car.
Drive train is Brand New. Nearly 0 miles, off the trailer 3 times for car shows. Engine is slightly modified with H-Beam rods and all top shelf stuff. Wicked Fast! ALL original body panels with exception of trunk deck. Car is not a rotisserie, but SUPER nice, and the documentation is perfect.. Price - $ 32,900”
70_GTX-1.jpg
Looks good but in fact in barely ran, "Wicked Fast" was an overstatement
GTX_interior.jpg
Interior was new to this car but not new. But did not matter I knew this was going all the way down and back again. It was a V-code and rust free.
 

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Can´t wait to hear the rest of the story, and see the pictures of corse, keep them coming, need some good shots of the engine compartment.
 
I bought it for $30,000, way too much but nothing compared to what I would ultimately have in it.
The tear down begins:
Lucky it wasn’t really “Wicked Fast” because the brakes would not have done the job …
brake blocks_02 (Small).JPG
The engine bay was pretty clean, rust free and no signs of damage
firewall (Small).JPG
Really good shape metal given the history of this car
chassis_01.jpg
chassis_02.jpg
 
Had original brake set-up (front disc and 11” rear drums) but 14” wheels. Going to 4 wheel disc and will get the 15" wheel stipulated in the build sheet (code 71 15"x7" Road Rally wheels)
front suspension (Small).JPG
Period correct muffler hanger …
lines_03 (Small).JPG
the cut-out in the trans tunnel for the auto they put in, but it seems it was not too disimilar to the factory cut-outs
chassis_06 (Small).JPG
 
Wheel wells in good shape, no rust at all
rear rails (Small).JPG
Big old steering box with about 4 full spins lock to lock, will go with Flaming River upgrade
steering box (Small).JPG
Had an 8-3/4” Mopar rear end with 4:56 gears that made it convenient for hole shots
brake block_rear (Small).JPG
 
The crank was not forged (from a later model, after 72), so it was out and need to go to 440 Source for a forged one
crank - old (Small).JPG
1968 440 block, but it was in good shape. It is the only engine component that I kept
Engine Block 2536430-8 (Small).jpg
Could have kept the double roller but will go with Jezel belt drive, they are just too cool
Engine Face 7R (Small).jpg
 
The trans was cobbled together from several models
Trans Case C 97372 (Small).jpg
Trans Cover C95664 Z (Small).jpg
But the tailshaft was correct for a B-Body
 

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Tranny ready to be sent off Brewers for a proper build that can transfer 600+ hp
Those headers were replaced too, good shape but not good enough and won’t fit the new Indy heads. That “period correct” street drag exhaust system was headed for the dumpster and another chunk of change headed to TTI for a super fine 3” header back x-pipe system.
Trans (Small).JPG
Got Dana 60 for it
Dana 60 (Small).jpg
with the correct BOM for a TrackPack 3.54
Dana BOM_Date (Small).jpg
 
The valve train was in good shape but also had to go. Wanted a full roller set-up with the new motor. No use in nice new heads without all the goodies. There will be a bunch of 440 stuff on eBay soon!
Engine Head clock (Small).jpg

Trunk pan replaced, the only bad metal on the car.
trunk pan (Small).JPG

and now headed in the right direction …
 
Ready for paint
Firewall masked (Small).jpg

The body was in great shape from the previous owner paint, it would only need to be buffed, but the undercarriage is going to be a different story
trans tunnel 1 (Small).JPG

Inner wells sprayed with tuff coat. A lot of detail work addressed putting this together.
paint3 (Small).JPG

Dana and rear going in, could not believe the offset on the rear end!!!
paint1 (Small).JPG
 
The shift tunnel was ground, seam welded and sealed as original.
shifter tunnel (Small).JPG

The K-member and front suspension went in just fine
K-member (Small).JPG

Really starting to get excited about this car.
gas tank (Small).JPG

It is coming together very nicely.
rear disc left 2 (Small).JPG
 
Building a reliable beast with all the best component parts
piston relief (Small).JPG

Decked, lined honed and ready to assemble
block decked (Small).JPG

All head work on the Indy Heads was done by Slick Rick at Naiser Racing
head cc-d (Small).JPG
head exhaust work (Small).JPG

Assembled and flow tested
head assembled 1 (Small).JPG
head assembled 2 (Small).JPG
 
Snug fit for a fresh motor and everything new and/or detailed
engine install 1 (Small).jpg

Super tight clearances in a lot of areas
distributer clearance (Small).jpg

oilpan (Small).jpg
 
The 6-Pack just about gets my motor going
Six Pack (Medium).jpg

TTI makes a sweet system, install, fit, everything perfect
undercarriage (Small).jpg

Need to cut the tailpipes to put the correct tips on
tailpipes (Small).jpg
 
Every aspect of this car is detailed, even that which can’t be seen after assembly

heater box before
Heater box_1 (Small).jpg
heater box after
Heater box_3 (Small).jpg

Steering column (Small).jpg
 
Interior.jpg

Dash is back in and it is time to redo the interior.
steering wheel.jpg
Steering wheel will also be on eBay as a correct 70 wood wheel will go in.

This time everything in the interior really will be “new”!
 
Car was entered in Autorama in Houston over Thanksgiving 2011
Autorama_02.JPG

Autorama_03.JPG

Autorama.jpg
 
Car showed very well
Autorama_01 (Medium).JPG

The interior does get dirty if you so much as look at it
Interior (Medium).jpg

Motor.jpg

The build sheet indicated this car had the Air Grabber but not the hood decor package, but it just looks too good with stripes not to have them on
hood (Medium).jpg
 
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