Well first, that converter looks like a disaster. I would be looking for something else. Second, whoever put that mess together clearly didn't realize that mopars frequently used a bolt pattern with one hole offset, so it HAD to be bolted together in a certain way. This is especially the case with an externally balanced engine.
Third, I doubt that it has a 360 crank. The 360 mains are larger, so the 360 crank would have to be cut way down to fit a 318 block. Also, unless it was bored out all the way to 4.00" bore to use standard bore 360 pistons, it would have required custom pistons,because of the added stroke. lots of money.
Fourth, if it DOES have a 360 crank, unless it had a bunch of Mallory added to internal balance the 360 crank, if there were no weights on the converter or flexplate or balancer , it would have shaked your fillings out.
Looks to me like a lot more detective work is necessary. Does it have offset weight on the balancer?
Edit. Mopar flexplate has an offset hole in both the crankbolt pattern, and the converter pattern. Looks like the ear that broke off was the offset one.
