Yes everything swaps, just use the right rod with the right case and its all good. In a long rod case the liner sits on top of the case in a short rod case it sits almost flush when its installed. Piston and liners are common with 2 exception. I will give you the important one for RE engines. You must use the piston and liner assy with the skirted or cut out area on the bottom of the piston on a short rod engine or it will hit the crank at the bottom of the stroke. You can use a short rod style piston and liner on any long rod nova RE engine. Rods are common as are cranks. Crank timing at the crank is the same between them all. All cranks and bearings interchange. All novarossi cranks are legal as are JP style cranks. All meet Ifmar and ROAR rulesets