Alright lets see if I can awnser some of these questions...
The threads on the crank are 8mm x 1.00
The plates on the front and back have ports under them that are directly tied into the portion of the intake manafold that lets air in at higher rmps. This seems to me to be epa related, because the ports under those plates will not be transfering fuel/ air mix.....just air making it run "cleaner" Im not sure how they do this without making the engine run to lean ??
Foamcut, I can make you a prop hub if you want...$25 shipped.
I should have more pics up sunday.