Carb question

[Red69stepside]

Hey guys--

I been off line for a while trying to get settled in a new place. But I'm finally getting back to taking care of my truck and need some carb help.

Only had the truck a few months, and am getting REALLY bad gas mileage, plus I'm smelling fresh gas in the cab a lot, and getting a lot of carbon in my exhaust pipes.

I have a rebuilt 327 and Holley carb. If I'm looking in the right place, the model number is

1850-4
0977

(See pic)

Also the PO removed the choke butterfly from the carb. Would this contribute to low gas mileage?

I heard about carbs with low-flow primaries and big secondaries that only kick in when you need them? Sounds like a good solution if it's real.

Appreciate any help.
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