what studs are to be used and a part # if possible

 

Arp 234-4317

 

That's exactly what I was going to say. The thinner factory castings bow/bend in between the bolts with higher cylinder pressures. Aftermarket heads like AFR's have a thicker deck that aims to prevent this from happening.

 

i had ported 317 on iron block...402...ran 20-24 psi on the little incons...740+rwhp...920rwtq...no head lift issues with the arp studs and mls gaskets. Check that tq wrecnh..my OLD snap on was off 10lb/ft....

 

I second that! 25psi stock 317's with ARP head studs and MLS.

 

tune tune and more tune. TwnTrboCE just pmd me that he didnt liift heads at high 8s!!! Now he is mid 8s and lifting heads

 

Yeah but you guys are using studs and not bolts. No way will that ever happen with just head bolts.

Are these people you speak of over torquing their studs too? That seems to help from what I've read.

 

TwnTrboCE was running STOCK headbolts when he had his incon kit running 9.9s...over 700rwhp with ported lingenfelter stock heads