Help with '75 18 ft Seacraft project

[fishhuntNC]

Dads boat was I think an 1986 or 1987 with a 150 mariner.I want to say close to 50 top end.The only reason I remember the year is a guy my dad knows got a 20 the next year it was a tracker model like mine I think 1987/88 was trackers first year.I believe I read that somewere when I was looking at my boat.Anyway I remember dad racing his buddy in the 20 with a 175, dad beat him.My 20 had a 150 yamaha on it 2 stroke it self bailed fine had good power to.