Absolutely will fit. I did it. 302 with 1" spacer, Holley 650, and 3" air cleaner. It really isn't the best for the street though. You lose too much bottom end torque.
I have a question. 302, 650 holley, 4v heads, headers, 2.5" exhaust, comp cam 230/236 @.50 w/520/523 lift. 4 speed. Car now seems slower than before with a milder cam. My rear gears @3.00 the problem? Would 3.55 make a big difference? Thanks!