The drop down wont work get the straight hydro mini mount. Even then youhave to move the motor forward on the mount to clear the carb barrel at wide open, and probally grind some of the moount away to cleare the flywheel.
I made these for my sport 21 hull...I used delrin to make the engine rail plate and the lugs. Moved the spacers in...drilled and tapped them together. Probably saved a few precious ounces too...here is a pic of what I did on a table saw and drill press.