Cliff's Quadrajet Parts and Rebuild Kits

Quadrajet Problem Solving => Quadrajet Parts and Numbers => Topic started by: Bill Stephens on June 13, 2016, 04:50:19 AM

Title: 7029207
Post by: Bill Stephens on June 13, 2016, 04:50:19 AM

I have a 1969 350/300 corvette with automatic transmission. It has a 7029207 quadrajet and I've bought a used one to rebuild. I have conflicting information on the 7029207. I've been told that it is a service replacement for all small block chevys over a range of years, but I've also been told that it is specifically for a 350/350 with standard transmission and needs to be modified before being rebuilt. I'm looking for definitive information before buying parts and rebuilding. Thanks.

Title: Re: 7029207
Post by: carmantx on June 13, 2016, 05:53:03 AM

What is the date code on yours?

Title: Re: 7029207
Post by: Bill Stephens on June 13, 2016, 06:54:16 AM

1685 on the replacement and 1308 on the car. Both are 07029207.

Title: Re: 7029207
Post by: Ethan1 on June 13, 2016, 09:48:54 AM

Quote from: Bill Stephens on June 13, 2016, 06:54:16 AM

1685 on the replacement and 1308 on the car. Both are 07029207.

 Welcome to CHP!

 Definitely a Service Replacement as per the date code and the part number beginning with a "0". I believe ALL Qjet carbs that started with a "0", were a SR carb.

Title: Re: 7029207
Post by: Bill Stephens on June 13, 2016, 10:06:02 AM

Thanks Ethan. So do you believe it doesn't need any modifications prior to installation on an automatic? What is the difference between quadrajets for standards and automatics? I figure there must be a difference since they specify different numbers, but are they close enough to be interchangeable?

Title: Re: 7029207
Post by: Ethan1 on June 13, 2016, 10:10:52 AM

Quote from: Bill Stephens on June 13, 2016, 10:06:02 AM

Thanks Ethan. So do you believe it doesn't need any modifications prior to installation on an automatic? What is the difference between quadrajets for standards and automatics? I figure there must be a difference since they specify different numbers, but are they close enough to be interchangeable?

 Bill,
 There is slight differences in jetting/metering and linkage on the throttle body. FWIW, I put a 1979 Corvette M/T carb on my A/T Chevelle and I had no problems. But, that is not to say you won't. Sorry, I cannot help out further. :(

Title: Re: 7029207
Post by: Bill Stephens on June 13, 2016, 12:25:31 PM

No problem. Appreciate your help. That's what I've been hearing from everyone so my guess is that it will work fine.

Title: Re: 7029207
Post by: Cliff Ruggles on June 30, 2016, 02:17:50 AM

The 07029207 and 7029207 SR carburetors were close in set-up to the originals but not exactly the same calibration.

I've built quite a few of each and the originals had smaller jets and metering rods on the primary side.

I suspect they recalibrated the SR's to cover a broader range of applications.  They are actually pretty common, but the original dated 7029207 carburetors are pretty rare.....Cliff