going in a different direction: have you cast all the other supporting actors in this production? transmission, stall, rear end, brakes, suspension?
because if you're still in the pre-planning stages... there's better money spent elsewhere than **** hot 318 build parts. which, don't get me wrong, i loves me some 318... but no sense in building out a rickey racer when nothing around it works or lets you take advantage of that new found power.
and yeah, that cam is vomitus maximus.
ETA: what's your budget?