James,
I had a car one time that exhibited similiar symptoms. It was a 350
chevy in an 81 corvette, so things may be different. The full symptoms
were that it ran fair, but with a little sluggishness, while driving it
normally. However, when romping on it a bit, it would backfire through
the carb consistently. I finally traced it to a couple of flat cam
lobes. One of them was as close to totally gone as could have been done
on a lathe. GM had quite a few cams going bad during that time period.
When you said that you were able to re-adjust the valves on #1 and
regain compression, I would suspect that set of cam lobes first.
Just guessing....
Cullen Bennett
Tempe, AZ
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