1970 Q-Jet Question

[Anthony S.]

Does anyone know when the change was made in 1970 between the 1st design 7040202 Q-Jet & the 2nd design 7040212 Q-Jet.

My pocket guide just lists both carbs but it does not tell of the approximate change date. I don't have a '70 JG.

The car is a '70 with a base 350 / 300hp & auto trans.

Thanks,

Anthony

[Clem Z.]

there is no 7040212 carb listed in the holley

catalog

[Clem Z.]

sorry,i ment rochester book not holley *NM*

[Clem Z.]

on second thought there is no such carb

in the holley book,so i was not wrong.i take back my apology.

[Dick W.]

Re: 1970 Q-Jet Question

To my knowledge there has not been a definite changeover date established

[Clem Z.]

dick are you saying there is a 7040212 Q jet ??

if so there is no listing in the rochester carb book

[Jim T.]

Re: 1970 Q-Jet Question

Anthony my original owner 1970 350/300 Corvette's Quadrajet is a 7040202 with FO DH stamping below the numbers. It is made by Carter. My 70 is a July car.

[Dick W.]

Re: dick are you saying there is a 7040212 Q jet ?

We have one listed in the judging manual Clem. I cannot verify that I have or have not ever seen one. Some of these numbers are from data furnished by Chevrolet. The number has been in the manual since late 1984

[Clem Z.]

interesting as none of my GM delco rochester

books list one. they list all the carb numbers from 1932 till they quit producing them