Improving acceleration using 2bbl Carburetor?

Or the cylinder pressure, or the elevation you are operating at. I see Wiki says the highest point in Ga is 4784 ft,while the lowest is sealevel. That's gonna make a big difference .
As will a 2.20 rear gear, a bad exhaust, a bad cylinder, or a bad TC. etc.
You need somebody competent to establish a baseline.

Here is my "Guess"

3.23 rear axle ratio on a 7 1/4 rear end. 3 spd manual trans.

Rear cylinder compression is at 90 psi, remaining cylinders are 110 psi.

Rear cylinder is farthest away from the radiator so that one looses compression first over time. Will still run a long time yet.

Pea Shooter exhaust pipe, 1 1/2" tube.

Oh yeah, like @Tooljunkie said, take a look at the distributor, "Points Distributor".