Help gas problems in my 72 chevy stepside

[BardonRedDeath]

I seem to be having problems in my 72 stepside i recently got and it ran fine for about 2 months , it starts fine idles fine however when you accellarate it seems to spit sputter and act like it wants to die (30-50 mph)
I have replaced the fuel pump spark plugs spark plug wires, also rebuilt the carberator (rochestor 4 barrel).

it does have the old point distributor.

it does not have vaccuum to the distributor from the carberator, is it supposed to? All of the other vaccuum seems fine

my question is other than the distributor what else could it be?

new user here with my first chevy WHICH I LOVE any help is much appreciated, if any pictures would be helpful just let me know i can post pics of w/e
THANKS!