I’ll tell you Dan, the biggest issue I have with any KB piston is the garbage 5/64 ring pack.
I can’t think of a single scenario where those thick tractor rings would be better and I can’t think of one.
In my world any piston made today would have no thicker ring than .043 and it could be made even more simple if they just used a 1 mm ring.
Other than it’s about all you can get IMO a 1/16 ring pack is obsolete as well.
Thick rings eat power, cause more heat and don’t seal worth a crap.