Thru the years we converted many fork lift engines from gasoline to LPgas. The only changes were the carburators, plus hoses and tanks. Some units were done to use gasoline or LPgas and used a plate between the carb. and manifold which fed the LPgas when switched from gasoline. The main...
Lisle Hones suggest approx. 280 grit stones to prepare a cylinder for standard rings and 450 grit for moly rings. I dont know if this is the type info you are looking for, but you may get more details from ring manufacturers.
