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i bought a rebuilt carb a year ago and it was immediately apparent that it was a restamp when I got it. It’s a beautiful restoration, and it works great on a 455 (pig rich on a 350), but since I now have the right carb on my car, I’d like to sell this one. However without the original numbers, I have no idea where this would belong. Can anyone help me ID this based on markings, configuration, or other methods? I’ll post a few pics, but I have more. Thank you!
I can't help with the markings. All I can say is if you can get the primary jet, primary and secondary metering rod, and secondary rod hanger numbers, someone may be able to figure out its application.
I can't help with the markings. All I can say is if you can get the primary jet, primary and secondary metering rod, and secondary rod hanger numbers, someone may be able to figure out its application.
Yea I think we get that, but I think the question is "what do the part numbers of the guts mean it is"? Those might lead to what the final assembly is built to be reproduced as.
I wish I could tell a re-stamp form one that isn't. I sure cant tell. And thats where the internal parts might lead to more in the investigation regardless of external bowl stampings.
The stamping looks good & the "UA" code is correct, but I'm no expert. If it's a true "256" carb it won't have a power piston or primary metering rods,they came from the factory with #58 front jets. I'd pull the air horn & check it out. Also at the front of the throttle plate there won't be a staked in plug for the part throttle power piston adjustment, it was just a bare casting. I posted a pic of my '68 Qjet with a circle showing the plug. Your choke pull-off linkage rod is on backwards & upside down by the way.........
I wish I could tell a re-stamp form one that isn't..
I think what the OP is alluding to is that the 256 looks crisper and deeper than the 7040
Re OP - Now that its re stamped I don't know if it matters what the orig application was. Just list it as a a good running carb tuneable for your application
Thanks, everyone - this is the info I was looking for, to a great degree. Yeah, as far as the restamping goes, there is a kind of patina to the metal everywhere on the carb except where the stamping is, and that spot is too perfect, in my opinion. That stamp is a little too crisp and deep compared to others I have or have had. I'll pull the air horn this morning and see if there is a power piston and primary rods, and I'll check to see what jets are in there. Rob1960 noted there shouldn't be a plug on the front of the carb throttle plate, and there is. And good catch on the choke rod being on wrong. I'll get all the numbers I can so I can at least in good faith get it to someone who can use it. 4speed455, I got your PM and I'll answer you later this morning when I have a little more info.
Ok, I pulled the air horn and there are no primary metering rods or power piston. The front jets are 58s. The secondary hanger is an “O” and the rods are “BE”. So it appears the carb was set up to run on a W-30/31, but I’m not convinced this is the real deal. And I flipped the choke rod as it is supposed to be...
I really appreciate everyone's input on this. I learned a bit more about the Quadrajets as I dug into this more. Really it's all about the internals - what jets and needles at what height - and the carb configuration changed very little over the years. For those that have been asking, I did sell this particular one to another member here, but I appreciate the inquiries.
October 6th, 2018, 01:58 PM
