73 duster acceleration problem

I have a 73 plymouth duster 318 auto trans with a 2 barrel Edelbrock #1409 I believe and I'm having some issues with it running. Upon start it will almost cut out then sputter and surge for a little bit then take off almost as if it was not getting enough gas or maybe too much? It does this when accelerating from a dead stop as well as when I'm on the freeway and remove my foot from the gas and speed up again. I have a month old distributor in it with an internal ignition module and an external coil which I just replaced yesterday thinking that was bad but no help, and I'm getting a solid squirt of gas from the accelerator pump. What is next on the list for me to check? Thanks.