I've got a 14' deep-v, wood floor with an older (1990) Evinrude 15 tiller on it I picked up this winter. Current prop is 9x10P 13 spline that came it which was previously run at low altitude. I'll be running at 8-9K feet. Anyone have a similar boat and motor with a pitch suggestion? I was thinking of getting a 7 or 8 pitch. Thanks.