i have 88 302 efi h.o engine and would like to know the clearances for main and rod I plan on running the motor on the strip occassionally but mainly i will drive it on the street maybe some nos but a little not no massive amounts of it.
I like to run .0020-.0025 on the mains and rods, except the #1 main I try to get closer to .0015 for better oil pressure. I'm sure others here will have their own specs.
Can't comment on the turbo or s/c applications but the above is what I ran in my old N2O motor. Bearings generally like more clearance for more rpm, open up the clearances for sustained high rpm and you should consider running a HV oil pump and a bigger pan.