FLOPGUY wrote:What I am mostly concerned with is ordering parts for the engine, is it possible to use the block's part number to figure out what engine parts I need?
Others may chime in but basically all Cubs, and other applications that used the C60 engine used the same block. There were some changes made along the way that increased the HP from about 9 in the beginning to around 18 at the end of production. Some of the changes had to do with the governor, engine RPM, pistons, manifold, carb, etc. Engine block part numbers are designated by R1 through R8 (not sure if that was the last one). Two of these were one had to do with the stronger front connection to the bolster and another was to provide clearance for the 12v starter. If you're concerned about the internal engine parts, download one of the parts manuals like TC37F and compare the information it provides with the parts you are looking for as well as the part numbers on the various parts of your engine. Check the parts numbers for size and mic everything for fitment to get the right size. A good machine shop should know how to get/fit about anything in the C60 engine. JMHO Stan
EDIT TO ADD: Parts Manual ENG-1 Rev. 20 12-75 is specifically devoted to engines and covers the C60 engine in detail.