I have a 1987 Evinrude 28 hp SPL. As eveyone knows the 28 spl are long shaft. I wanted to make it a short shaft but when I took the 5" spacer out and pulled the 30 13/16'' drive shaft. I found a very odd spline count on the low end . 19 splines on bottom and 14 on top. Most short drive shafts I...