Carburetor Size (Street and Strip):

Street Carb cfm = (max rpm x displacement x 0.85) / 3456
Race Carb cfm = (max rpm x displacement x 1.1) / 3456

That'll get you your ideal CFM size. Jetting will depend on your compression, timing, and cam. Depends on your gearing, cam, and transmission on if you want vacuum or mechanical secondaries, etc...

I've got a 650cfm Edelbrock Performer with vacuum secondaries on my 350. On my 383, I've got a 750cfm (although oversized) Street Demon with mechanical secondaries.