Thanks guys, that's helpful.

I'm surfing around and found this 'How to ID a Small Block Engine' guide on ForAbodiesOnly ... I'll email it to my brother..

https://www.forabodiesonly.com/mopar/ams/how-to-id-a-small-block-engine-block.35/

- Scroll down to the first sheet titled "Vehicle ID Plate Interpretation". --> This says a 1966 273/4bbl would be an E code in the VIN. I have my doubts because of the weird 1966 VIN decoders I found everywhere else claim it would be a D code.
- Scrolling further down on that Allpar page reveals another sheet called "Engine Number Interpretation" ----> This looks more helpful if my brother can find and clarify the Engine Number.. the 4th digit is a "Special Info After Engine Series" and lists a number of useful codes, like "H" for standard 4bbl, "HP" for high performance, etc. Even an 'S' code specifically for "1966 275 HP 273" - which was probably for the Super Stock D/Dart cars.


There is another thread I haven't finished looking through:
https://www.forabodiesonly.com/mopar/threads/273-engine-identification.421289/

I'll do some reading..
- Art


Last edited by 67SATisfaction; 11/29/21 10:14 PM.
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