[Gregski]

well Donkey Kong, even with a single brand new base gasket between the intake and the carb (no spacer for now, keeping it simple) we got pretty much the same results

so then we found this Holley video - it claims an ignition problem, check spark plugs, plug wires, distributor, and coil



How To Diagnose Common Engine Problems With A Vacuum Gauge

https://www.youtube.com/watch?v=NrnzD7PgoHI