[karlp]

I get the feeling that you were looking for reassurance that your comp. readings were O.K., but it sounds like you need a warm engine to test
I just finished putting rings in mine and ran it on the bench. I stacked three cinder blocks under each side of the front mounting bar, put a 2X6 on top of the cinder blocks and ran lag bolts through the mounting bar holes into the 2X6. I stacked three more under the tranmission end and strapped the tail of the trans. to the top one.
The motor is carbed so fuel was not a problem. Gas tank out of the lawn mower. Electrical is straight forward.
I didn't bother checking compression warm anyway, because the rings are new and I can't run it this way enough to seat them. Besides, regardless of readings, it is going back in because it sounds good. New rings cold read 110-105 on all 4.
If you have the time and inclination, I would set up a way to run it out of the car. It sure is easy to adjust valves and look for oil leaks and fix tin and all that. Besides, It's real cool to show your buddies.

Karl