Engine dies when warm

Hey guys newbie here trying to get my slant 6 going in my 73 duster. It turns on fine and idles beautifully. After it warms up and the choke opens it also will idle nice. When I go to put it in gear and let off the brake it creeps forward on its own well but the second I step on the gas it will die out & then won’t restart unless I keep my foot on the gas but as soon as I let off it will die again. Any idea what would be causing this?
Here is some information:
Holley 1945 reman, i have one that ran previously on the car about a year ago and one I got a few days ago from classic industries - the problem happens with both.
Valves have been adjusted .010int .020ex
cylinder pressure is around 110 on all cylinders except #1, it is about 95
New plugs, wires, & distributor
Vacuum is 19-20 Hg at idle