I've got a 1988 (88 i think) 16 foot Bass Tracker made out of fiberglass (back with Trackers still made fiberglass boats).
It's got a an old 80 horse Merc on it and I can get it up to a max of 45+ mph, when the trim is right, the water is calm, I'm the only one in the boat, with no water in the livewells and low on gas. ;D
Most of the time, it tops out in the high 30's.