well what i was referring to is. if he has the block sleeved he should be putting some serious power down. enough to pop the stock sleeves. and usually in order to pop stock sleeves and warrant after market sleeves head lift should no where be an issue. hence if you have sleeves you should have at least at minimuim standard arp 2000 head studs. if not L19s. right have sleeves has nothing to do with head lift. but if you have sleeves you shouldnt have any trouble paying for proper parts to prevent head lift at stock sleeve numbers.Originally Posted by green91