Yep ACME A12 you are right on that one. Most got totaled in crashes. Like the Cuda- Swinger's-Duster's-Chargers and the other mopar muscle car's. Drive the hell out of it because you could.Welcome. Your best bet to find an A12 is on the LOH Playground. Not a lot of 4-speed A12s out there that truly (if you catch my drift) have their original matching numbers engines. Those cars were built for one thing and one thing only. Most were rode hard and put away wet. Good luck with the search.
http://a12mopar.com/yabb/YaBB.pl?board=forsale