Quadrajet Problem Solving > Quadrajet Parts and Numbers
Factory jets and rods
Ethan1:
--- Quote from: MG60 on August 07, 2015, 12:43:53 PM ---So there was no 7040270 carb in 1970 ?
--- End quote ---
What model Pontiac are we talking about here? I am assuming the GTO?
Ethan1:
--- Quote from: MG60 on August 07, 2015, 12:43:53 PM ---So there was no 7040270 carb in 1970 ?
--- End quote ---
You would be correct. I went right past it. The 7040270 is the correct Qjet for the Ram Air IV.
.070" Primary Jets, 39 Primary Metering Rods, "K" Secondary Hanger and CC Secondary Metering Rods.
MG60:
Yes Ethan1 your right , the 7040268 was for the 455H.O. and the 7040270 was for the 400RA IV . Could you take a look at the front cover of Cliff's book and tell me what you think the carb is ? I think it's of a Buick GSX 455 Stage 1 . What numbers were used on those carbs and what were the internal specs ? How much different were they from the standard Buick 455 carb (auto) ? Was the Stage 1 option only available for 1970 , 1971 & 1972 ?
Ethan1:
--- Quote from: MG60 on August 09, 2015, 06:36:51 AM ---Yes Ethan1 your right , the 7040268 was for the 455H.O. and the 7040270 was for the 400RA IV . Could you take a look at the front cover of Cliff's book and tell me what you think the carb is ? I think it's of a Buick GSX 455 Stage 1 . What numbers were used on those carbs and what were the internal specs ? How much different were they from the standard Buick 455 carb (auto) ? Was the Stage 1 option only available for 1970 , 1971 & 1972 ?
--- End quote ---
Not sure on the front cover Qjet. Cliff would be best to answer.
The option for the Stage 1 went from 1969-74.
Which year are you interested in?
MG60:
1971 and 1972 .
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