Ok so my father-in-law gave me this older aluminum boat hull. It is 20 feet long, about 7 feet wide at the widest and the sides are 30" tall. He says it is 1/8 sides and 5/16 or 1/4 flat bottom. It originally had a 1978 Merc 150 in it, it would get to about 53 mph and start chine walking, the motor wasn't wound out yet. I don't need a 50MPH boat, just something more reasonable. What power would you guys put on it?