I am running an offy intake, Holley 350 cfm 2bbl, stock 2 1/2" exhaust manifold, and stock ignition. I have a convertor from 24v-12v that runs the ignition.

It was running great when I first got it going and driving it often, then the miss just showed up. Fuel filters are all clear, checked those last night. I also checked all the wires for any chaffing or rubbing.