2001 GMC Sierra 2500HD 4x4 Ext. Cab Long Box - LB7
I've got 200k on my LB7 and a leaky head gasket. I just removed the driver's side head and noticed the rear cylinder (#8 I believe) was the culprit. The bottom head bolt at the 6 o'clock position (the one not under the valve cover) removed with ease and was coated with a very very thick coating of rust. I have the ARP head stud kit ready to go once I finish rebuilding the heads, but my concern is the strength of the cast iron block material. The bolt itself seems to be intact and the rust appears to be block material itself. Should I worry about not enough cast iron for the new head studs to bite into and forever being a weak spot for a hot (600hp) engine? Or do I have to consider a new block? Any thoughts would be appreciated, thanks!