recurve the distributor for 24 to 26deg initial advance at idle.
36-38deg total at max advance. ( shorten the mechanical advance curve to 12deg).
Change to a RPM style dual plane manifold. The single plane has no low end grunt. it don;t get busy till 4500++rpm.
holley 750 carb jetting should be 70 to 75 pri and 80 to 86 sec.
Needs a 4.5" power valve.
You need a lot more gear with 44" mudders.