I need a recomendation Prop Professionals.I have a 1988 280 regal,twin 5.0lx alphas,8800 lbs dry,wot44-4600,.I currently have 141/2x17 cupped props.It takes a bit to get on plane and that does not bother me.Once it gets on plane I cruise at 3100 rpm-23-26 mph and she is really fuel effecient.The...