Well It Leaks AGAIN!

yellow rose said
Where did the leak down air go? If it was into the pan, that's ring seal. It's almost impossible in 1985 to get rings that don't seal.

I'll be interested to hear what the conclusion of the matter really is.

It has weird patterns on the cylinder walls. To get it to 420 CI. The piston is almost a hockey puck! Not much skirt with gapless rings. Not to hijack. Didn’t smoke just a bunch of crankcase pressure.