Project "Unicorn" 69 Dart

So it made it to the shop but barely, it dies under load. The owner (old manager) said that it seems like the accelerator pump in the carb, because it starts up fine but rev it up and when it comes back down it'll die and almost every-time under load and even sometimes without. Anybody have suggestions as well or a test I could run to confirm this?

I got it in the air and started the teardown progress was slow because of the grease seal on the new wilwood kit, what a PITA and the hardline is fused with the soft line so I called wilwood and time to run new larger hardlines anyway, but got the wheel on and some pics