Does the E2D usually have a solid or hollow crank?
The E2D Crankshaft does not have the cross feed tube required for constant speed use. This crankshaft can be transferred to the long front main-bearing case (with a drain port being drilled into the bearing saddle) but it cannot be converted to constant speed use.The O-320-E2D has a hollow crank. It's not the crankshaft that keep it from using a C/S prop. It's the front main bearing and crankcase design.
I was pretty sure the crank and bearing size are ok - it is the case I'm worried about. There is a plug on the outside where the fitting would go, but this kind of made me concerned that there is an internal port that is closed off. You can see what I mean between the dowel pins. Perhaps I'm just worrying too much!