The way I see its not such an uphill battle. The block and head are the only things new, everything else is already in place, pistons rods cranks valves cams rockers lifters pushrods geardrives ect. in any size you want. Valve covers and intakes are made up also. What I'm saying is all the parts on an engine now are aftermarket, so incorporate it all, you don't have to reinvent the whole thing.