Looking for a motor for my vintage 1600. The boat is in awesome shape, just needs a motor. I need to know what other owners of this boat have put on theirs. I currently have an evenrude 70 and it measures about 22" on the shaft. but the boat just won't get going faster than about 30. Also I am measuring the transom and to the bottom of the V, as this boat has all the way back is @ 25" so I'm assuming I need an XL shaft motor of 25". Please comment.