Take care of it, those are hard to find, they only made them for a couple years. Yes in general aluminum boats like the prop 3/4-1" lower than what you would typically run on a fiberglass boat. Also those run much better if you grind the welds down on the bottom some. I would run a 6" jack plate and start with the motor about 4" below pad and work you way up until you no longer gain speed. A 23" pitch Tempest or 22" pitch Fury is the props I would use.