[Old Truck Man]

Running out of ignition acts just the same as fuel. You stated you have HEI ignition. Did you replace the ignition wire to the unit with a solid copper wire? the original lead to the coil on chev trucks is a resistor wire. I keep a known good two bbl carb handy. with a variety of adapters I can install it on almost any engine. If I suspect a bad carb I swap it on and test that way. Is your vacuum advance working. Is your centrifical advance working. Did you cause a intake manifold leak when you had it apart?