Who would you let rebuild your Holley carb?

KrazyKuda brought over a new 600 and it started and we ran it for the full break in,so it was the carb. I'll post the video shortly. Do you think a 600 Vac sec will be good for a 9.1 340. The one I have is a 750. We shut it down after break in to let it cool off and to let the smoke air out and now it's not getting spark and only 4v at coil. I installed a new mp kit I had laying around.