I'd almost go .525 or more lift if it's a solid lifter cam. Heck my 318 magnum dirt track engine was going to get a .550+ lift hydraulic cam that Jim at Racer Brown custom specced, it's for pretty much a bone stock 318 with pistons flipped, home head porting and a good airgap/stromberg wwc 2 barrel combo. I'm turning that 318 up to 6,500 rpm with junkyard pulled factory roller lifters. If you throw a solid cam and lifters in that 318 with good pistons, heads, intake and 4 barrel it'll really scream. That will be moving it BIG TIME