Here's what I want to build for a guy with a 85Z. A 406 vortec hybrid motor. Basically, heres the parts:
Alum vortec heads, 200cc int,72cc exh 64cc combustion, 202/160 valves
comp cam 230/236 .49/.49 110 lsa
cast crank with 5.7 rods
static compression at 9.5 dynamic at 7.5
750 edelbrock carb with air gap intake
long tube headers into a y pipe
3 row aluminum radiator

I think this should be a good, solid combo, what do you think?

 

i think the pistons will need too much dish for a 9.5:1 comp ratio with 64cc heads. you might have a detonation problem. everything else sound like it will work well. you would need a 25cc dish at 0 deck clearance for 9.5:1

 

The pistons I found are actually 30cc dished. What calculation are you using for compression ratio.It seems like wherever I go, I get a little bit different number every time.

 

http://www.csgnetwork.com/compcalc.html thats a little too much dish for me. the flatter the piston top is the better quench you will have (less chance of detonation)