Another Newb with his first Mopar.

Just picked up a 69 Valiant, and I really know nothing about Mopar. I'm coming here hoping someone would be kind enough to answer the many dumb questions I'll have.

First off is identifying this engine. I've been everywhere trying to find out what it is? It's a slant 6, but it's not original to the car. None of decoders really tell me what it is.

The head stamp behind the alternator reads, 2 225 T 6 25E. The only other numbers I can find is on the driver side of the block. It shows, 330 A, then a metal tab behind the header that reads 6 11 82. Those numbers match nothing I can find.

Next is, how are the stock trannies and rear ends in a 69 Valiant? Would need a big upgrade on both if I went turbo, and a 4 barrel on this 6? I have access to a 8.75" Mopar rear end, just don't if it's necessary yet.

I'm also going to assume I can use a ton of parts from other A bodies. Are there any quarter panels from other A bodies that will match my Valiant? I really need a right rear quarter, but there no other Valiants around I can scavenge from. But, plenty of others.

Thanks in advance, guys. I'm sure you'll be seeing a lot of me in the near future.
Author: Karpathion