denf221

I have a 72 cutlass 350 the carb needs rebuilt or replaced, can someone recommend good replacement carb that can be bolted right on, I don't know that much about them. Anyone know what original CFM was, it is 4 barrel.

jaunty75

I recommend rebuilding it, and I recommend doing it yourself. It is not difficult, you learn a lot about how they work along the way, good youtube videos taking you step by the step through the process are available, and a kit is usually only about $20 versus the $150-$250 you'll pay to have it done. Then the satisfaction you feel when you bolt it back on, hook everything up, start the car, and hear it purr cannot be duplicated.

I've rebuilt two carbs in my time, a 2-bbl on my '67 Delta's 425 and a 4-bbl quadrajet on my '78 Toronado's 403.

I found this video very helpful when doing the 4-bbl. I had my laptop computer on my workbench in my garage with this loaded up, and I followed it step by step, pausing it along the way as I did each step.

Fun71

I agree with rebuilding it yourself. Back in the early 80s I didn't know anything about carburetors and was timid to crack it open and mess with the innards, but I jumped in and was surprised at how simple it was. A basic rebuild kit and some carb cleaner can do wonders. Since then I've been through many carb rebuilds and I've developed a reputation as "the carb guy" from my friends.

As for your question, that era QuadraJet is 750 cfm.

olds 307 and 403

If it is stock to the car, either you rebuild it or send it to somebody like Everyday Performance, who can recolour it and replace the bushings as well. His price is similar to a new carb or mass builder's price and will be right for your motor.

Sugar Bear

Find out if it is original to the car, if it is have it professionally rebuilt by a Quadrajet specialist and you will be very happy. The original carb is internally tuned to your powertrain options. A rebuilt that fits many applications cannot be as precisely calibrated so at best it will be good but never right on the money.

If it is not original and is a wide range of fitment rebuild then it probably does not matter.

If it is original and you get a rebuilt one, keep the old original one.

Good luck!!!

Olds64

If you don't want to rebuild the carburetor I suggest having it rebuilt. You also might consider buying an OE replacement. It would be cheaper than an aftermarket carburetor.

https://www.rockauto.com/en/catalog/...arburetor,5904

The problem with any repelacement carburetor is that you will have to tune it once you install it. Do you have a tachometer and vacuum gauge?

shiftbyear

It's best to stick with your original carb. The linkage and vacuum ports are exact for your vehicle. I've only heard good reviews from Everyday Performance, Cliff Ruggles is probably the best but has a 12 week backlog. I'll be happy to do it if you can't find anyone else. Good luck.
http://www.everyday-performance.com/
https://cliffshighperformance.com/

denf221

Thanks for responses

oldcutlass

To answer your original question, with the stock manifold the only carbs that will bolt up without an adapter is a spread bore. Spread bore carbs don't offer many options. With an adapter you can mount a square bore.

olds 307 and 403

The Street Demon is the only aftermarket carb that will bolt on your stock manifold. It will probably need leaned out some, a kit is available and a use a thick base gasket. It is a 3 barrel carb, which may cause interference. Available in 625 or 750 cfm, it is heavily based off the old Carter Thermoquad.

oldcutlass

No, you can still buy a Holley 0-80555C Model 4175 650 CFM Spread Bore carb.

olds 307 and 403

Forgot about them, my bad.