Be patient, I'm still figuring out how to use this site! Maybe Homespun91 can help me out with with my Holley carb ID. I'm looking to buy a rebuild, renew or trick kit for it and even though I've looked @ a lot of these sites, I'm still having problems with the ID. The top number on the horn reads: 3878261-EH. Under that is: LIST 3310. Under that is: 165. Visually it is: dual feed, vacuum secondary, has a secondary metering body, and a hot air choke. One site said it's a 4150, but when I looked @ the blow up drawings for 4150 carbs, the were single feeds! One site says the top number (with the EH) is a 65 Chevelle 425 HP 396 carb! Can anyone verify that! Need some expert help!
Sounds like the original 3310 750 cfm carb with vacuum secondaries. The numbers above baffle me! Could be a carb that GM bolted on a 396/375 or bigger.. The list number R-3310 is Holley's aftermarket stamping number. I'll look it up later. If it has the down leg boosters, it's a 780. Show us a bunch of pics of it and a closeup of the choke horn!! Thanks!
Thanks for the reply! Couldn't get a close up of the air horn numbers without the flash causing a white out, but I double checked the numbers and they do match my original listing. Another thing I noticed is the throttle plate has no connections for the PCV valve or distributor vacuum advance hoses to connect to.
Your carb may or may not have ever resided on a Chevelle. It's original application was for a '65 Z16 (3878261-EH), although the production date signifies it was built in '71 (1='71; 6=Month/June; 5?=week of month), making it a service replacement carb. Chevy apparently sold a boatload of those carbs, as I've seen them in fairly prolific numbers at swap meets and even in the cl***ifieds (Hemmings, etc). Obviously, one might tend to think that since its original application was for a Z16 that it carries considerable value. That's not necessarily so, however, since people restoring their Z16s are more interested in having the correctly dated carb (along with the right "numbers) bolted to their intake. It's still a cool carb, but probably doesn't have much more innate value than a standard "List 3310" carb from Holley. Hope that answers your question.
Thanks for the reply. What I'm really interested in is ordering the correct rebuild or trick kit for this carb. Is this a 4160 stlye 780 cfm carb or does it have some other Holley designation?
I don't have anything to add to what these guys said; they covered it. So far as the kit is concerned, you can do a couple of things. Holley offers both Renew Kits and Trick Kits. The Trick Kit is a rebuild kit, but also includes some tuning parts; not jets, but different accelerator pump cams, a couple of different power valves, acc. pump nozzles, & so forth. It actually covers the 4500 Dominator series as well as most other "aftermarket" Holleys, so it has a LOT of extra stuff. The only current number for your carburetor is 37-933. The Renew Kit is a basic rebuild kit and as such is considerably cheaper. You ** probably ** can use the 37-485, but the earliest 3310s, the 3310 & 3310-1, call for the 37-1539 which again is a sort of universal kit and has a lot of different basic rebuild parts (no tuning parts). The 37-1539 is fairly expensive, though. However, those two early 3310 versions were made in the exact same timeline as your particular carburetor. Be aware that almost all 3310s call for the 37-754 Renew Kit...but, it only covers 4160 models and will not have the correct gaskets. Just for general knowledge, you actually have a 4150 carburetor. The difference between a 4150 and the 4160 is that the 4150 has a secondary metering block (not body ); the 4160 has a secondary metering plate, and the rear bowl appears to bolt directly to the main body (the plate is sandwiched in between the two). Though there is a great deal of confusion out in the field, in reality, the number of fuel feeds, the bowl styles, number of idle screws, and secondary type make no difference. (There is a caveat to that statement: it is possible to have either vacuum secondaries or mechanical secondaries on a 4150-style carb, while 4160s are "supposed" to only be vac. secondary....but that's not exactly 100% set in stone and there have been a few exceptions.) Virtually all 3310 carbs are of the 4160 type, originally, but it is entirely possible to convert them to a rear metering block, making them into a 4150-type. I do this relatively often, because I typically like to do a lot of tuning and carb swapping, and secondary plates are very expensive; plus, if you drill them, you can't go back. Convert the carb, which costs about $50 as a one-time expense, and you have a tunable carb for a lifetime. There are other brands of rebuild kits; for example Quick Fuel makes good ones. You can also go to NAPA with your carb numbers and get an Echlin kit, or other parts stores and get kits. Some of the quality of these are better than others. Since you do have something of an oddball, being made for Chevrolet, I'd probably call Holley to confirm the proper kit. No point in paying for the 37-1539 if the 37-485 will do, at one-half the price. Confused yet??
Gus, If you do happen to call Holley, do me a favor & post which kit # they recommended...I'd like to add it to my notes. Another source you might check with is carbking here on the H.A.M.B....I don't know for certain that he carries kits for the newer Holleys, as he deals with a lot of vintage carburetors (I guess I'm dating myself as a 40 year old Holley doesn't seem "vintage" to me...weren't those just released a few years ago?? ) but it would be worth the phone call. His web site: http://www.thecarburetorshop.com/
Judging by the looks of the venturie bores, down leg boosters and throttle bores, it looks like the 780 vacuum secondary carb. I have one just like it only it's calibrated a little different. It carries a List # of R-4557. I looked it up and it said it's a LS-6 454 carb that's setup for 4-speed and emissions. Some say it's for a 396 or 402 375hp.... I'll get the numbers and post and post'em here tomorrow.
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