Did a compression check on the 630. The #2 cylinder was at 40 on the test! Going to do a valve job on it now! Since we got it off doing a rings and pistons. Looking online for LPG pistons is a needle in a haystack! Thinking about using old pistons with new rings! Had anyone done that? I had always gotten both new with new sleeves in other projects! It was a cotton picker at one time in its life!