E3, the machinist that did my 292 block got LP gas pistons using the information from the Doc Frohmader build-up article in the May 1997 issue of Classic Trucks. He stated Sterling #980P. These were 0.030 oversize. I assume the 980 is the lp piston and you have to state what oversize you want. But your parts supplier should be able to tell you for sure and also order them for you. Frohmader says they came from Federal Mogul. The article used to be on Clifford's website. Don't know if it still is. Sam
