New 318 build, just need some input.

Ted265 said
I think you will be alright with piston to valve clearance, the valve releifs are pretty big on the KBs but check it out anyway. (Clay is cheap)
Mine are 0.015" above deck and had heaps of clearance with a 0.574" lift cam.
The 302s aren't the best head but if you have a fresh set already clean the bowls up and any casting flash in the ports and send it.

TT5.9mag said
Max lift is not what causes valve to piston contact guys. Max lift happens when the piston is no where near TDC.

Mopar wedge engines are known to have a modest amount of P/V clearance.
Cams in the .520 lft range have clearance with factory flat tops without reliefs.
The overlap period is where the problem can arise.