Monte,
Thanks for the info. I do use it to check the barrel valve setting on my Ron's Flying Toilet, LOL. But that is a reference, I make final adjustments based on the wideband A/F readings at idle and staging (footbrake) with the 60ft results.

I didn't do any leak down tests since the 1st year (5 seasons now). And since the oil loss event (2 qts left in the pan, perhaps it just drained down...), I didn't want to start it for fear of hurting the crank if the bearings did take a hit.

After I take it apart, I will make the final decision, but my initial impression is that since it has 616 runs on it, and it is coming apart, I will have to take the time to have a shop hone it so the new rings seat properly. That is more a pain than the cost.