I found a mopar forum!

Yep its got a 30 over 340/904 with a body 3.91 sure grip. My dad also has one his hase a 30 over 340 with indy revised aluminum heads and a 4 inch stroke with 904 and a body with 4.10 sure grip.

Nice! That`ll make me think twice about taking on any AMC`s. Lol!!