I used cast iron rings. I did put the rings in the cylinder bores and check the ring gaps. They all were within spec and I did not file any. I made sure they were offset per the instructions.
I measured the bores before I installed the pistons and I believe they were all at the max diameter end of the spec. I built this a year or so ago and I haven't found my notes yet.
I probably had the valves adjusted too tight during the breakin as I set the to zero lash and then went another 1/4 turn while they were cold. I re adjusted the valves after everything was hot and the compression number stayed the same.
I didn't get a chance to put a few squirts of oil in the cylinder to see if that increased the numbers.
