I am looking at props for my corvair powered project. I have spoken to Arrowprop and they have one that I believe is 66" or 68" which is what they recommended. I am wondering if I could use a 2 blade Warp Drive with this engine and benefit from it being adjustable?? I am estimating the HP at about 100. Probably not more than that...Any suggestions from those that have run a corvair engine??? Thanks..Fred in SC