Alum. heads will take longer pushrods-------------
Tighten them down till they just have the clearance out of them, NOT preloaded , just no slack, Then adjust ur preload, "going thru the cycle of course" . I always used 3/4 turn, but that was a small block chevy, don`t worry about collapsed or pumped up, they will pump up on start up------Then do it again.
