The Ford Barn - OK at idle, no acceration

THIS IS ROUND TWO!
36 distributor on a 59AB engine. Helmut distributor and coil rebuilt by Skip, new condenser, new plugs, new plug wires, rebuilt carb and fuel pump, new battery and cables, new ignition resistor.

Engine starts easily and idles well. Excellent fire to the plugs. I have tried a different carb. The plugs are in the right holes. I checked the auto advance mechanism; the piston is properly lubricated and moves freely. It seems to be set properly. The vac line is new condition and there is vacuum at the distributor. I moved the timing adjustment both directions as far as it will go. The engine runs best fully advanced.

What do I do now? I've tried everything I can think of after reviewing what many others have done. HELP1

Royal Ryser