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I have come across some holley 4 bbls. in the local scrap yard (3 of them), and was wondering which carb is the better. I want to run a Holley, so dont try to convince me otherwise, but I don't know how to tell the older ones appart, or what one to look at. They are all in fairly rough shape, but between the raceshop and I we can rebuild them, we have done many a rochester for the racecar. I have no carb/motor in the car now, but later this week, my motor should be ready to fire. It is a basically stock 355, with centerbolt heads something like a 262 cam, dual plane intake,... essentially "stock" ;) . It is going in a 1980, with a T56 6 speed and 3.73 gears. In two years, the 500HP smallblock is going in, but I will have a new carb on top, so that is not really an issue. If anyone has any HOLLEY suggestions, or general carb stuff, advice would be appreciated.
If you are going to use the car on the street then you'd probably be better off with a model that has vacuum secondaries. Find out what models the 3 carbs are and look up on Holley's website and find out what the specs on each are. There are a couple hundred different models of Holley carbs for a bunch of different kind of motors. So just rebuilding one of them might not get you what you want as far as performance goes, the carb has to be setup for your application.
The model number for Holleys are usually on the front of the air horn, but they can be stamped all sorts of places. Just record all the numbers you can find and search the Holley site for matches. If you hit a model number it will come up.
Carb ID numbers are on the front of the choke horn. The first number is the auto manufacturer's part #(if aplicable) The second line is the Holley list #. The last line is the date code, the first 3 #s being the day of the year and the last is the year.
You have to guess the decade. :rolleyes: Good luck :cheers:
As posted above, you need to know the "LIST" number.
Look on the air horn for the word "LIST" followed by a number.
The LIST number can then be cross-referenced to the correct model number, and then there are dozens of people on here that can help you pick one.
Several of us have the Holley Illustrated Parts & Specs catalog which will provide the info you need. Also, Holley has a web site with a partial list of carbs. You may find a match there.
So... give us the list numbers... and we'll do the rest.
One caveat... if the carbs are late model Ford carbs, we won't be able to help.... Holley is restricted from publishing data on these carbs by an agreement with Ford.
One of them is off a ford, but I am not sure what. My buddy picked that one up for me. When I get the carbs out of the shed, I will look up the numbers on them and post them here/ look for them on Holley web sight. I believe they are all vaccum secondaries, and all seem rebuildable. How new is the Holley ford aggrement? I will try to find out what year that carb came from, as it is in the best shape. As always, you guys are great, and I will keep you posted :)
I don't know when it started, but here is what happened to me-
About 1993, I was installing an Edlebrock manifold on a 68 Couger with a 302 for a customer, and he came up with a Ford Holley out of a junked (abandoned) Ford van with a 351 in it. Probably a mid-80's vintage van. I tried in vain to get a kit to rebuild the carb from all of my sources.... a very, very long list of names. Nobody had any sort of listing for it... including myself (full set of Holley Catalogs).
Finally, I contacted Holley directly, and they told me I had to go to Ford for the kit... Holley could not supply me with any parts for the carb. Had to deal only with Ford. And guess what?? The carb kit cost $75+. Now remember, this is 1993 when carb kits were $15 to $20 max. Luckily, I was still in the business full time & had an account with Ford, but it was still too much for a Holley carb kit. For a few bucks more, he coulda bought a new carb.
Recently, another forum member went through the same deal.... no listing anywhere... it was a "Ford" Holley.