Too Much Carb?

One thing to consider when comparing the six packs is they are progressive and come in as rpm and fuel demands increase,you dont really have that option with a 4v carb-especially if its a double pumper.I was in a pickle and ran a 850 d.p. on a pontiac 400 with a stout cam,9.1 compression and ported heads/headers and it would barely idle and was a real bear at any rpm under 2k.You can jet it down considerably but then you will create other problems because your getting to far out of the carbs original setup/calibration.Im not trying to sound negative but it would be reall challenge to get it to run right or even decent.If it were me I would sell or trade it for a 650-750 carb and save some headache.