I just picked up a 401 long block and a qjet manifold for it. any suggestions on what qjet to look for that is best. planning on keeping fairly stock probably put in a bigger cam.
In general, the '76--'80 Q-jets are the best. Of course, you'll have to look at throttle lever compatibility, choke compatibility, and fuel inlet compatibility.
Is this for your Skylark, Electra, or??? A 66 Qjet should match up with little or no mods needed. Someone will post the reasons against, but I've had several 66 Riv's with both original and service carbs and never an issue. John
This is one of those topics where you can make the learn more and make best decision for your application. Two books are an essential to anyone running a quadrajet. "How to rebuild and modify Rochester Quadrajet carburetors" by Cliff Ruggles, and/or HP Books "Rochester Carburetors" by Doug Roe. There's also a dedicated forum to carburetors on this site. Do an archive search and see what's been said before. http://www.v8buick.com/forumdisplay.php?f=84
i have a rebuilt 1966 4jet that came off of my 66 lark. it does need a new accelrator rubber boot due to sitting. $25 plus shipping.. also have a pertronics ignition in a 401 distributor for $75 plus shipping.. Paul 66larkgs
Here's a link to an old thread on the subject - http://www.v8buick.com/showthread.php?t=225394 and another - http://www.v8buick.com/showpost.php?p=1709940&postcount=15
The carb in that picture is the square bore not a spread bore like a qjet....will not work on a spreadbore manifold without a adapter...
It would be a waste of a fairly rare Quadrajet manifold to not use it with a Quadrajet. As Doc said, the carb. in the photo is not a Quadrajet.
Car Craft Article about their experience with the Q-Jet - http://www.carcraft.com/howto/57178/index.html
I have always liked the pre-feedback Quadrajets. My '72 Olds Cutlass 350 came with one that stayed in place for all of the 247,000 miles that we had the car. I did overhaul it and replaced it's floats at somewhere around 175,000 miles, but that was preventative maintenance because I had a float issue with my other Cutlass. Some Quadrajet floats didn't like unleaded gas. The major reason that I chose to use an Edelbrock carburetor on my pickup's 425, is that the "Endurashine" faux-AFB is prettier. I still have the Quadrajet and manifold that came with the 425, and no, it is not for sale. And although the Quad's design is sophisticated, they are actually pretty easy to overhaul after you have done one.:Smarty:
66 Q jet and intake on Ebay, Any bets on the final bid price? http://cgi.ebay.com/ebaymotors/_W0Q...emZ330609135761QQsspagenameZSTRKQ3aMEWAXQ3aIT
The QJet number looks up as a replacement carb for 1966 with CA emissions. I'll guess it will stay under $300. John
I've got a couple of Q-jet manifolds for a nailhead, one is fine, the other needs an "ear" plus a small part of a passage welded on - you'd have to see if the passage on a single square bolt manifold is the same and cut it off to weld onto the manifold I've got. I've also got a couple of '66 carbs - federal, not CA. One is part number 702640; it looks good, but probably could stand a good cleaning and a kit. The other is a GM service replacement carb - 7041340. It looks even better (not as dirty) but it too could probably use a kit to freshen it up. Send me a PM and let me know if you're interested. Ed PS - I'm keeping the 3rd one for myself to go along with an 800 cfm Q-jet from a 77 Olds 455 that was used in a GMC motor home. The REALLY nice thing about this carb is that none of the linkage is below the carb to manifold bolt surface of the so there no linkage interference.
Good to know that the later q jet's don't have the lower linkage interference with the intake.... Although, Do they cover the entire U shaped exhaust heat channel completely or would one still have to plug the heat holes to use a '76 to '80 model o No:
