Car dies in gear...

Yeah this is a good running engine. No changes have been made besides swapping carb and plug wires.

I have tried nutral RPM from 500 to 1,000 with no luck. Tried ported vacuum to dizy and tried plugging the vaccum with no luck.

In the past I used ported vaccum with the 750.

When I rebuilt the carb I sprayed it out with compressed air and carb cleaner. It almost seems like the air bleeds are clogged but at 1000 rpm I can hear them.