The carb. you discribe is not a Q-jet. & did not come on 70-71 models. It is a good carb. however. It is similar in performance to the Edelbrock. These are called square bore carbs. because the primaries & secondaries are the same or near same in size. The Q-jet is called a spread bore. The secondaries are much larger than the primaries. This gives good gas mileage & drivability at idle & part throttle. Also the manifold you use may not fit spread bore carbs. I would keep useing it if it is working good. I understand there is a demand for the 4 jet on E-bay & swap meets. They came on many models up to 65 & guys want to go back to originality. They are getting rare.

They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.
1972 Chevy c10 Cheyenne Super
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