If UL cylinders can be safely bored out to STD ULH. Main problem is the ULH STD bore is 3.421875 and all after market STD ULH pistons are 3.4375. I am at the Max oversize for UL pistons so it's either go up to the ULH bore or sleeve the cylinders. I would have to bore about .030 to .035 larger to reach 3.4375. Using torque plates goes without saying.
Well the rear piston in the UL (FlatBoy) decided to go south today. Not sure what caused it yet seeing as how there is just under 2000 miles on it since the rebuild. Only change to the motor over last year besides a rebuild is the flywheel scraper clearance has been opened up to .020. Both front and rear skirts on the rear piston are scored bad. Piston clearance was set at .0025 on both pistons. No smoke from the rear cylinder and no indication that something was going wrong. Just suddenly started making a lot of noise. Front piston looks great. Used the same skirt to wall clearance last year and had no problems and got 10,000 miles on it. I did replace the pistons over the winter with a set of Dixie pistons, last year I had Eastern Pistons. Had my choice between both of them this winter and chose the Dixie pistons. Both have the same makings inside but are definitely different in weight and machining. Dixie appeared to be machined better but now I am not sure. The Eastern pistons were lighter and the wrist pin bore and the counter bore for the lock rings were not concentric with each other. The expansion strut in one of the Eastern pistons was bent.
Figures just as the weather is starting to get good.