915 IS 3 A

Bought 915IS 3 A   about a year ago to hang on a KitFox. My understanding at the time of purchase was: If you buy the A model you can put on a constant speed prop, or you can block off the oil supply if you want to put on a ground adjustable prop. What is the procedure to block the oil from entering the prop hub ??? Any thoughts and or part numbers, etc.  would be greatly appreciated. I want to start with a ground adjustable prop and then change over to a constant speed prop at a later date.

Thanks,

TJ Beatty