[Jim Sims]

There are parts in the vicinity of the studs (like the through bolt o-rings) that heat could damage so I would first see if you can get the studs "moving" without heat with a good stud remover. Six weeks ago I helped a friend do this job and we used a cam type stud remover (Sears Craftsman) to remove the studs and a Snap-On collet type to install studs. We used a thread chasing tap (not a thread cutting tap) to clean out the tapped holes; one can get a set at Sears or buy the individual one you need from Snap-On. If you plan ahead, you do not have to remove the camshaft from the cam tower nor separate the cam tower from the heads.