LMM: What Grade headstuds to use

[Harbin_22]

I destroyed some head gaskets with H11 studs only. 72/483 twins, around 80# boost 1,100ish HP. They lasted maybe 4,000 miles before they went. Put back 625's with Oringed heads with no troubles with tripples and recently some nitrous lol. Not sure what boost is exactly now, but it's in the 90-100# range.

 

[CRAWLEN]

I destroyed some head gaskets with H11 studs only. 72/483 twins, around 80# boost 1,100ish HP. They lasted maybe 4,000 miles before they went. Put back 625's with Oringed heads with no troubles with tripples and recently some nitrous lol. Not sure what boost is exactly now, but it's in the 90-100# range.

Well if that's the case, 625 machined flat block and heads will be more then enough for Mark's 68/71 stg2 at 800hp, but will rarely see that power only when I want to have some fun