I build mostly SB Chevys . But I have rebuilt 396s and 402s . To me it was like working on a big SB Chevy . But there was a guy I worked with . And he had a 496 built for the strip . I know it had Brodix heads and a Edelbrock victor intake with a Holley dominator carb . The cam was around 615 lift and it was a sold flat tappet type . He had this engine in a all steel 1968 Pontiac LeMans with a TH400 4200 stall and a 456 12bolt . That car ran high 9s and smashed the oil pan one time doing a wheel stand .