You will need headers $700.00, Water inlet blocks(no water pump)60.00? motor mounts600.00+/-, Cam it for the Rpms you want. Clearance everything a little more than in an automotive application to make it live. There are some tricks for known oiling problems in high rpm applications. The alternator starter carb can all remain that way you can get replacements almost anywhere. Don't tell Kragan that they are in a boat. Waranties are great for these items.