Sounds like I'm mistaken about the crankshaft being hollow and the engine not being capable of conversion. This time, I'm glad I'm wrong. Sounds like there's a C/S prop in my future.
Now just getting all the parts and making sure fit right.
Here's my flang... I am currently swinging a Catto 2-blade wood/composite with 7/16" bolts. The hub for the prop looks to have four of the six wholes drilled out for the flange lugs, but two are the size of the bolts.
Can this be machined (prop/flange) to fit?