Just wondering if there is an actual documented procedure out someplace there for initial setup. Have looked many times, but never found one.

So, like gmc-is-me, I took the hot spec, added 0.002" - 0.004", then reset when hot.

BTW, made this in excel to know which valves can be setup on #1 compression/exhaust. Keep it on my smart phone so I (hopefully) can find it when I need it.

It is for the 2136000 cam, and is in 10 deg. increments, but should be close enough.

Best Regards....
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GMC 270 Valve Timing.jpg (91.44 KB, 113 downloads)