Hi all, this is just me brainstorming here but in another thread Matt (CluttonFRED) brought up the idea of a cheap kit for an air cooled four cylinder direct drive inline engine of 50-ish horsepower and it has me wondering what the minimum number of bespoke components would be for such an engine. For example, cylinders/pistons/valves/rockers could be sourced from a small industrial engine, crank and cam (plus lifters, main bearings and caps, etc.) from the automotive world, hardware is universal, and so on. Could it be as simple as just needing a crankcase and accessory cover to tie all the catalogue parts together? Has it been done in recent times?