Quadrajet Problem Solving > Quadrajet Parts and Numbers

Which Qjet exactly was on a Chevy 1978 BIG 10

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Kent:
Hello does someone here know which Quadrajet was exactly on the BIG 10 in 1978? I know it was a different one than on the normal C10. Here a picture of the intake.

And which gasket is the right one between the carb and intake? I always see the open one but I ask myself why does it need to be the open one just for all the grooves and channels on the carb and intake? A closed 4 hole would make more sense in my opinion as it would create 4 nice holes for a good signal and even distribution.

Kenth:
The 1978 "Heavy Duty" C10 carb with divorced choke would be #17058213.

The specification sheet calls for an 1/4" thick open flange gasket.

Kent:
My intake says climate choke I would say, as there is no evidence for a divorced choke on it. So the part number is maybe not the right one.

Kenth:
I may be wrong, but isn't there a screw hole to hold the choke beneath the hose in your picture?

tayto:
all the (original) Big 10/Heavy Half i've seen had a divorced choke

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