Stalling Issue (Slant Six w/Holley 1920 Carburetor)

Soooo. I had the same problem on my 273 with a BBD carb. My float level was not high enough so at idle it was fine. Cruising around it was fine. The minute I went Wide Open Throttle (WOT) the car just stalled, like it wasn't even running.

I don't know if you can do this with a Holly, but, I pulled the top of the carburetor off and ran the car, when I went WOT I could see all the fuel leave the Power Valve Well and the car would stall, I nudged the floats just a bit and now it runs just fine.