F200/F175 or smaller?

[Blue_Heron]

The Tracker hulls are not as sensitive as the Potter boats to weight aft. If the boat is intended to run 50+mph in smooth water, and there's no need to be able to stay on plane below 20mph, the CG will want to be further aft than a Potter that's bound for 3'-4' seas.

You might be fine with a 500 lb. 200hp motor as long as you don't hang it on a bracket. Check the bottom of the hull from the transom forward about 4' with a straight edge and look for hook. My 20' '83 Seacraft Industries hull has some hook and it keeps the bow low at speed. If yours has some hook in it, that will work in your favor with a heavier engine.
Dave