I'm also watching for updates. When I first read he was using a six pack setup, I was thinking that was over-complicating things for a new build unless he was sure on another motor that all 3 were working fine.

Maybe they were? But I would think if they were working fine, that information would come up as a way to rule them out. Hopefully it is just a matter of bolting a 4 barrel manifold and known good carb on there.