I'm converting an "old style" Homelite 45 (black top Timberman) for an airboat. How does the free-wheeling threaded thing (bar oil pump ?) come off of the clutch end of the crank? I thought I'd ask before I buggered something up. I'm thinking motor mount, de-fin and balance the flywheel, shorten the crank, muffler, throttle linkage and prop hub. Am I missing anything? Does anybody still sell a prop hub for these ? Does anybody have a pic of their hub? I was thinking 20x8 prop to start. Thanks in advance, MIKE