help !I read my book , but still dont quite understand how much angle the boat sould have when cruising along the book said that 2/3 of the bottom should contact the water when cruising , I have a1970 13 1/2 ft Glasspar G3 with about a 1965 ( white stripe )65hp merc shortshaft with a dolfin . motor is a little big I know . at the last setting it would not plane out and the motor would rev up but not speed up , I moved the tilt up and now it starts to bounce the nose up and down in slitely choppy water at 3/4 throttel ,with me 180 lb & my 101 lb kid and a 6 gal gas tank up in the nose . how much boat should be in the water ????? HELP PLZ