I am just hopeful for a compression gauge which functions consistently from one cylinder to another. I do not care what the actual numbers are. That "number" is merely a function of calibration, not accuracy. One only needs to focus on the percentage differences between the 6 cylinders.
If one wants to obsess on the calibration of a compression tester, then one should contact NASA to find out where they buy theirs and who calibrates them.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission