rebuild of 68z/28 engine questions..

[Lynn]

Spend much time at 7500 and you will likely pull a rocker stud, unless someone converted them to screw in studs or they have been pinned.

As far as springs, shims, installed height and spring pressure, I would NEVER assemble an engine I got in parts without doing all of those things. Just basics.

If you have a vise, you can buy a cheap spring pressure tester from Speedway for $60 MOL. One of the good things about the 30 30 cam (or the Crane copy from 1994) is the soft ramps that allow use of springs that are NOT that stiff. If you find they put really stiff springs on there (like the over the counter 142 spring) you can put stock springs back on it.

I don't know why you would rev it about 6800. There is plenty of torque at the next gear shifting at 6800.