Is their anything that I can do to my 1996 B-3000 4x4 extended cab Mazda truck to make it have more power because I have to down shift every time I go up a hill and the speed domineer still drops and it is all it has to go 80 mph on the toll road and that's with it floored the hole time

 

B.:

Make sure your engine is well tuned. Start with plugs, wires, distributor cap and rotor. Make sure the throttle body is clean, give it a "Seafoam" treatment. It won't make a NASCAR truck out of it but it should run better.

If you are asking for modifications I can't help. Someone else might have an answer.

I gather it is a manual and the clutch is fine. So focus on the engine.