360 cam
Sorry if i missed it, but what is around the motor? Gears, tranny/converter, headers or manifolds, weight of car...... Higher gears, 4 speeds or good aftermarket converter, and light cars allow for the use of more cam (more lift/duration). But without knowing any of it, I'd say keep the lift between .444 - .474, duration between 212-224* @ .050. If you are running factory manifolds, I'd run a split pattern cam.
I'm running even less cam in one of my 360's. I think it's .427/.444 lift and .204* on intake @ 050. But I have factory manifolds, stock converter with 2.45 gears.