try a cam with a steeper profile.
adjust the pump arm lever at wide open throttle with approx .020 play between arm and adjuster.
once done return to idle position.
there should be no play at all between lever and adjuster.
any movement of throttle the gas should squirt not drip.
if you still have bog then the adjuster spring is weak and best wy to fix is to bent the arm a bit or get a better spring.
or get a higher capacity pump kit.
usually called a REO pump.