I have a rather naive question on VIN numbers on a Road Runner vs. a Superbird in 1970.
Since in 1970, a Plymouth Road Runner was either RM23 or RM21, and only came with a 383, 440 6bbl, or Hemi, would it not be true that any VIN number beginning with RM23U... would have to be a Superbird? Is that not the only way a RM23 car would have a U code, or 440 4 bbl?
Thanks.
A GTX can also have the same VIN code. So no, the U code by itself is not a determining factor.
Ah, yes. Good point!
Quote from: Tri-Poised on January 22, 2016, 09:35:47 AM
I have a rather naive question on VIN numbers on a Road Runner vs. a Superbird in 1970.
Since in 1970, a Plymouth Road Runner was either RM23 or RM21, and only came with a 383, 440 6bbl, or Hemi, would it not be true that any VIN number beginning with RM23U... would have to be a Superbird? Is that not the only way a RM23 car would have a U code, or 440 4 bbl?
Thanks.
Yes
RM23U would be a Superbird only
RS23U would be a GTX
Yes, a 70 GTX would have RS as the first two digits....... if you EVER see a RM with a U for engine, you have a Superbird, period....... now, an RM with a V or R for the engine code is another story........
RM- road runner RS- GTX
In 1970, yes, U code RM23 cars would have to be a Superbird. (Unless the VIN was mistakenly stamped which did occasionally happen.)
The only other RM U code combinations I know of came in later years - couldn't you get a U code Road Runner in 1974 or so? (about the same time the GTX became an option package on the Road Runner.)
Quote from: Arnie Cunningham on January 22, 2016, 01:48:22 PM
...- couldn't you get a U code Road Runner in 1974 or so? (about the same time the GTX became an option package on the Road Runner.)
1972
I have seen (2) RM23U0 cars that were not Superbirds (no A13 code and J number not a Bird). I have at least one of the full VIN and tag info. I have to dig them up... was 1980's pictures.
I was told a few days ago that a U code roadrunner recently sold and was documented. Anyone have info on that car?
Please don't forget: They used to say Scary Larry's V code 72 roadrunner didn't exist ("they never made 6-packs in 1972"). And no "root beer" colored Superbirds.
Galen's Little White Book shows at least one known example of a RM23U0A 'Runner (i.e. non-Superbird; Galen noted it had a 440-4/auto), and my edition was printed back in 2001. That's the exception which proves the rule, I suppose.
By now more examples than just that one may certainly have been unearthed... but generally-speaking, RM23U0 = Superbird
There could be a couple of GTXs out there that got mis-stamped RM instead of RS... :shruggy:
there was a thread on Forbbodiesonly that had a well documented u code 70 Road Runner , it looked legit