Selecting an engine platform come with a a lot of questions. Do I go type 1 or type 4? Do you want high revving or big torque? One of the sites I got some basic info from was https://www.type4secrets.com This site has lots of information to help you make your decision.  Tom is from So. Cal and has moved to Wyoming. He's spent lots of time researching type 4 parts & pieces. This podcast will give you an overview of what the type 4 advantages are.  His site is here. Book your room for one crazy weekend here Support the podcast here