I was just commenting in the other vogue thread, pretty sure this is the one I had. In fact I'm certain. Had the 77 house kit, they recast the airsal from some china supplier but had some other supplier make the pistons, so they didn't actually match and the ring sat squarely in the exhaust.
It caught on the way down and would pop a chunk off the top off the piston. I lost one kit before I realized it and then put a new piston in minus the top ring, bottom ring alone was enough to run ok