68 Valiant Big Block

Just bought a 68 Valiant with a 496 big block in it. Definitely a 383 block, stroked with? Full race set up, roller cam/rocker motor, P4532134 heads, extra parts, M-1 intakes, stud girdle etc. So I may be here quite often, asking questions. It has a Ford 9" rear end, and a powerglide trans. 13 inch slicks. Trans brake, line lok, all the race stuff. I'm real excited about this one!