C3 1968 Quadrajet question

[Jim B.]

I am an original owner of a '68 convert 327 350hp HT block engine.

Over the years I have tried to buy a backup carburetor, for use when I rebuilt the original. When I went to the dealer with the carb number , 7029224 code OB I was told that there was a mistake and that that carb did not exist. I checked with NCRS and the tech book says I should have a 7028219 code DG quadrajet. That was confirmed by the dealer so I bought one. The performance of my car went down significantly so I rebuilt and used the original carb. The '68 I have runs very strong and has 2 1/2 inch exhansts. I am now trying to restore it and would like any info on this quadrajet carb that I still have.

Does anyone have any info on this situation?

Thanks for any help.

Jim Boudreaux

[William C.]

Re: C3 1968 Quadrajet question

7029224 shows as a truck application Quadrajet in the 44th edition Hollanders. That would cause it to carry richer jetting than the pass car variant. Generally, a Rochester carb that ends in an even number is for an auto trans setup.

[Clem Z.]

Re: C3 1968 Quadrajet question

7029224 is a 1969 350 truck carb with 67 jets and 38 rods and with 7034320(AN) .070 dia tip secondary rods. 7028219 1968 corvette HP M/T with 66 jets and 36 rods and with 7034822(BG).040 dia tips secondary rods. at WOT the 7028219 is richer because of the .040 diameter VS the .070 diameter secondary rods.

[Jim B.]

Re: C3 1968 Quadrajet question

Thanks for the response but I am still confused. There is no doubt that my Car was delivered with this carburetor in 1968 as I took it then. It hardly seems likely that a later carburetor could have been installed before delivery, so I will go back and recheck the numbers. I will post the results.

Thanks again

Jim Boudreaux