69 383 barracuda
The best to my knowledge, I have the orig fendertag with my "S" is there is A53 on the fendertag. If it is a "cuda" it should read A56. I havent been able to find the buildsheet with my car, so I dont know how it gets laid out on paper, only on the tag. Cool find either way, especially it being a 4 spd. Post pics once you get her home!!
Steve