I have a1966 6hp twin. It has chunk of one blade so am planning to just remove a symmetrical piece from the other blade. just wondering if in the giant web there might be a cross reference to props, shaft size & spline etc. I know-pie in sky but maybe. I posted a bit about fixing the blown out snap ring bearing retainer last year. It runs VG so being as I have no boat my next project is grafting a transom on a free Wet Jet hull.