Fuel Starvation / Mechanical Fuel Pump

I haven't the foggiest idea. It was bought new and the only thing I did was change the jets.

The car is currently buried in boxes until it cools down and I can fix a few other issues. I've received a couple of other tips and will apply when I yank her back out of the garage in October.

What is your vacuum reading in park and in gear? What power valve is in there?

Check to see if your holley has screens at the fuel inlets. One of mine did, one didnt. If your needle and seat are old, they may be sticking.