So here goes. Sorry if this doesn't flow well, but I'm not operating on much sleep
So on day 18, I think I've stumbled on the problem. The piston seems too small for the bore. I initially think my engine must have a .020" over bore done, buuuuuuuut the STD size ring gap is good, so measuring ensues. The piston I removed is 3.62" almost on the money (I think it waS 3.62301...").
Begin day 19:
I give the old piston a good looking over and decide I could probably salvage it. The top is pock-marked from the spark plug core, but 99% of the damage is cosmetic. The top compression ring groove was scrunched in one spot slightly and pinches the piston ring a bit, but I think I can work with that.
Actually, I almost HAVE to work with that because I' m getting dangerously low on funds after all this oil pan dropping, and topping back off (figure: gasket, oil, and gasket sealer every time I've had this apart) and it's all adding up.
So I get a set of swiss files and take off most of the burrs that are causing the pinching. I only do as much as is necessary to get the ring into the groove, I then take off any remaining friction by inserting the largest chunk of ring into the groove and rocking it back and forth until it's smooth. This is some "Mississippi Institute of Technology" stuff right here:
All in all it's done to my satisfaction, and all is good. I make the promise to Mrs. Hungary that I will devote my full and undivided attention to the birthday party this weekend, and all the preparations necessary (clean, mow the yard, etc). As an added bonus for my good behavior my choke coil arrived in the mail:
Yay!