I've just got my 1966 283 pg Impala running again, and I'm into the tuning and tweaking phase. I haven't rebuilt the Rochester 2GV yet, although it's obvious I should. The fast idle cam linkage is binding on the choke rod, causing poor performance when the engine is cold. Additionally, the gaskets around the base of the carb leak fuel (and vacuum?) only when the engine is cold. I think the idle circuit is blocked somewhere, as the idle mixture screws don't seem to adjust anything.
Oh, and cylinder 4 has a persistent miss
Anyway the reason I'm posting is that the engine stalls when revving under load (like when stalling the converter) and then releasing the gas pedal. Let's say I'm attempting a burnout, revving the engine against the converter and the brakes, when I finally let off the gas, the engine stalls. Happens hot, happens cold. Park, drive, neutral, going up hills, accelerating from a stop sign and then letting off. Whenever there's a high load on the engine, and the gas is cut off, the motor just quits.
Sometimes it has trouble starting up again, like maybe the cylinders or intake are flooded.
What do you think? The easy answer is to rebuild the carb and see if it stops happening. I am planning to do that, but I've never heard of this before and I don't know what's causing it.