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SPECIFIC question where to find matching numbers on 69 RR engine

D

Darcy

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I have done tons of research on this. some forums say in back on top, some say passenger side on bottom, some say behind starter and some say decode the stamp because there was no numbers on engine in 69. Can ANYONE really help? the tranny is stamped. I am the 3rd owner, I talked to original owner she said she never changed engine. my buddy had it rebuilt but said it was the same engine. I thought I saw something when I rebuilt it but now I am trying to sell my Roadrunner Convertible 4 speed 383 but people keep asking me for proof.

https://www.forbbodiesonly.com/mopa...speed-matching-numbers.130358/#post-910668176
 
Darcy said:
I have done tons of research on this. some forums say in back on top, some say passenger side on bottom, some say behind starter and some say decode the stamp because there was no numbers on engine in 69. Can ANYONE really help? the tranny is stamped. I am the 3rd owner, I talked to original owner she said she never changed engine. my buddy had it rebuilt but said it was the same engine. I thought I saw something when I rebuilt it but now I am trying to sell my Roadrunner Convertible 4 speed 383 but people keep asking me for proof.

https://www.forbbodiesonly.com/mopa...speed-matching-numbers.130358/#post-910668176
Click to expand...

Starting in 1968, ALL big blocks had serial numbers that matched the last 8 digits of the vin stamped into the. This link shows you the exact location it will be.

http://www.moparts.org/Tech/Archive/motor/36.html

***Note: Often times these numbers get filled in when someone paints the engine so you MAY have to scrap the paint off the ID pad to see the numbers***
 
In 68 it would be on top rear near the oil sending unit.
In 69 it would be on the passenger side just above the oil pan rail.
 
1969.. Passenger side pad below / aft of the engine mount. Doesn't get much easier than that.
beerestoration2015 090.JPG
beerestoration2015 091.JPG
 
yea nothing there, i scraped off paint
 
scraped paint in 3 different places nothing
 
Darcy said:
yea nothing there, i scraped off paint
Click to expand...

Then it's not the original motor if you're certain the pad is blank. If it's blank and still has the correct milling cutter pattern in it (and someone didn't grind it smooth) then it would be a warrantee block.
 
Darcy said:
cant read it, would have to remove muffler and manifold, tried getting cell phone in there to take pics but always blurry
Click to expand...
Darcy said:
cant read it, would have to remove muffler and manifold, tried getting cell phone in there to take pics but always blurry
Click to expand...
Odds are then, its either an early model year 69 that the engine was actually made prior to the vin stamping or it was a warranty block, possibly changed before it even made it to the dealer in 1969. Either way, sounds like you're not going to be able to confirm it is numbers matching.
 
im certain it is original motor, neither of these 2 people would lie to me 2 owner car. One's a nice old lady and the other is a high school buddy from the 70s
 
Darcy said:
im certain it is original motor, neither of these 2 people would lie to me 2 owner car. One's a nice old lady and the other is a high school buddy from the 70s
Click to expand...
like i said, its entirely possible that the engine was replaced before it even made it to the dealer to be sold. Would not be the first time that's came up. So while niether the original owner or your buddy replaced the engine, it still could have been replaced. Regardless, you can't say its numbers matching unless the vin actually is stamped and matches. Now, if i were you, i'd pulled the manifold and get pictures of the casting numbers, especially the date code. At least you'd be able to say the block is DATE code correct IF it is.
 
Stick your head in there.. no reason you can't read the casting number on either side. Passenger is partially hidden behind head pipe connection, but drivers side is not.
beerestoration2017 323.JPG
beerestoration2017 324.JPG
 
dukeboy_318 said:
Odds are then, its either an early model year 69 that the engine was actually made prior to the vin stamping or it was a warranty block, possibly changed before it even made it to the dealer in 1969. Either way, sounds like you're not going to be able to confirm it is numbers matching.
Click to expand...
my build sheet would say which month correct? See that is what I was talking about, some say no stamp in 69. Stamps didn't start on all cars until 1970. See Im still getting all kinds of answers
Superbee says 68 on top, 69 on bottom
dukeboy says all 68 and after on bottom
dadsbee says warentee if milling marks, not original if not
 
ok gonna see the car this afternoon, will try and get pics again or just read it if I can I will get back to all
thanks for now, gotta run
 
Darcy said:
my build sheet would say which month correct? See that is what I was talking about, some say no stamp in 69. Stamps didn't start on all cars until 1970. See Im still getting all kinds of answers
Superbee says 68 on top, 69 on bottom
dukeboy says all 68 and after on bottom
dadsbee says warentee if milling marks, not original if not
Click to expand...
the build sheet is not going to confirm what engine is sitting in it now. You have to verify with whatever numbers are there. Bottom line, it doesn't matter where it is at, if you've checked ALL those places and no 8 digit serial number, then it can't be verified as a numbers matching engine. Period.
 
Last edited:
Darcy said:
my build sheet would say which month correct? See that is what I was talking about, some say no stamp in 69. Stamps didn't start on all cars until 1970. See Im still getting all kinds of answers
Superbee says 68 on top, 69 on bottom
dukeboy says all 68 and after on bottom
dadsbee says warentee if milling marks, not original if not
Click to expand...

I think you are confused by the replies. The original factory engine in 69 would be stamped with the last digits of the VIN. If it has no VIN number stamped, then it is a warranty block that replaced the original stamped engine. It is possible that the original engine was found to be defective after it came off the assembly line and was then replaced with the warranty block before it was shipped to the dealer. This would explain the fact that there's no numbers on the block but it was never replaced by the nice old lady or your high school buddy. Hope that clarifies things for you.
 
you know... there is another possibility. If your buddy had it rebuilt, maybe the shop switched the blocks... :fool:
 
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