Carburetor Question - Is this a good call?

That's called a lean spot.
Have you done a vac test at idle to at least get an idea of the correct range power valve?
What number is on the shooter and what color pump cam? For now you can mess with the pump shot in pumpkin till you get it to roll on the throttle smoothly as for stopping at wide open you're going to have to find out the vacuum rating pick a power valve a couple below that so enough enrichment occurs at wot to cover for the lagging mains to catch up