Best base plate for a 17057274 800 cfm q-jet??

[Mr.Pontiac]

After some research, i see this carb. had hidden idle screws . My carb. giving to me has no base plate. Is there another yr. i can swap on the body for better maintance and performance to make it come alive?? Strictly for a drag car.

[Frank400]

Not sure I understand your question, but your cab, 17057274 does not have "hidden" idle screws as you say, as this is a 79 and up deal only, and yours is a 77, with still 10-32 idle screws.

[Mr.Pontiac]

Frank, my 17057274 carb. has no base plate, I have seen on the internet that it had the hidden screws under the caps. Can i go 1 yr. newer on a baseplate and make it work???

[Cliff Ruggles]

Incorrect.  The hidden screws were first used on the 17059263 Pontiac 400 4 speed carburetor.

The 17057274 didn't use them and only uses two screws to hold the baseplate to the main casting, the later one uses 3......Cliff

[Frank400]

7043308 is the casting number on a 17057274 baseplate.

[Mr.Pontiac]

Both are correct, yes 2 screws. Thanks for the input