How to tell if you are overcarbing an engine?

If it's the original torker 340... find a stock 340 4 bbl intake for the engine. Torker 340 is the biggest POS intake ever made for the SB mopar, sp2p is a close second. IMHO.

The torker II 340 is a better piece, still not as good as a dual plane on a stockish engine.

Should have been smelted to make other intakes.

A 750 vac carb is fine once the tune is correct.