I bet there is a big cost jump from a 1915 to a 2332 - stroker crank, piston rods, cam, heads, extra oil cooling, and bigger carbs --- along with the transaxle. That cost jump is close to the Subaru swap. Like they say pay once and feel the pain once. If you have to ask "where can I find an air cooled mechanic?" - then go with the Subaru. Some 1915 can just be an economy build (veiled as a performance engine) --- if only the P&C are larger with the appropriate case/head machine work then you're getting only 80-90 hp.