Top end speed out of tiller steer "fishing/hunting"rigs

[splac]

I have a 1648 Alweld with a Tohatsu 40hp 4 stroke with the Yamaha 16 pitch Black Stainless Steel Prop loaded (3) three batteries, trolling motor, ice chest fishing gear and (2) two big men 250lb running 39mph at best. Looking to get a new hull this year undecided on witch hull as of now. Impressed with the new motor and they have made some really good changes to the motor. Water pump is awesome compared the older Tohatsu motors and sips gas.