i just got back and the boat did awesome!!! it went from barely getn on a plain and blowing out on turns to jumpn up and haul'n *ss! top speed before install was 24 and now she'll do 38 with a full load of fuel 2 men and a dog. thanks to all who helped me figure out what the problem was (especially big shrimpin) and macojoe, i promise on the next project there will be more pics! to answer your question kamikaze, there was no kind of modification. no reaming. the extension pieces for the shafts just slid on top of them and slid into place with no problems.