The Stovebolt Site Forums The Shop Area Engine Shop Dubl-Duti carb help

Still working on my Carter BB-1 carburetor article and have one carburetor with a bunch of confusion:

Carter BB-1 number 2987s is listed in the Carter index as being used on a 1959 and 1960 Chevrolet truck. I have never found a data sheet, nor a print in my Carter stuff, and the Carter index does not specify if the 2987s went into production or was cancelled.

That most reliable of all sources ;), the internet, gives me information that the Dubl-Duti production ceased in 1955; BUT a new Dubl-Duti serious began in 1956, ending in 1962.

The internet also states that the "Thriftmaster" engine in the new Dubi-Duti was a 235 with a Rochester type B; BUT an engine known as the "Thriftmaster Special" was also a 235 that retained the updraft carburetor on forward control models.

The Chevrolet Master Parts book states that Carter 871SC was used through the 1962 model year on the 235 forward control trucks.

The newest Carter parts list I have on the 871SC was printed in December of 1956, and stated the 871SC was used at least through 1957.

So does anyone know with positive proof:

Was the 2987s ever produced? Cancelled? Anyone have one???

Or was the 871SC used through 1962?

Thanks in advance!

Jon

I have one, possibly 2, in a pair of 1959 Grumman bodied step vans on Chevy Dubl-Duti forward control chassis.

One of them I've taken out and the tag shows 2987S. This is on a 235 with Hydramatic.
The other looks outwardly the same except no ribs on accelerator pump well, and no tag. Also a 235, with a manual, but may have had a Hydramatic originally, not sure.

Jon, I have one stovebolt engine with an updraft carb setup- - - -not sure of the application, but if you can share some pictures of the ones you're researching, and where to look for ID numbers, I'll be glad to do a comparison. Since my need for such a carb is somewhere between "slim" and "none" you'd be welcome to it- - - -no charge!

Edit: Are 2 barrel carbs with the 90 degree air horn configuration for military 270 GMC engines worth anything? I've got a few of them.
Jerry

Grigg - I would be interested in the 2987s, as I have no sample of this one. The one without the tag is probably an 871 of some vintage, of which I have all of the variants.

Jerry - I am not familiar with these. Manufacturer ? Identification ? As to the BB-1's of interest. My only interest in the BB-1's is to acquire one of each for my article, and attempt to help folks identify them. Here is a link to the unfinished article, with pictures: https://www.thecarburetorshop.com/Carter_BB-1_carburetors.htm

Jon

Here's a few pics:

The updraft carb I have has a cast iron housing. It's mounted on a spray-oiler engine, most likely a 235 from the early 1950s. If you can use it, I'll be glad to remove it and look for more ID numbers. The military carbs are Holley, with a built-in governor, supposedly from WW II or slightly newer GMC engines. Probably 270s. I have three of them, with no real use for them. They were included in a horsetrade to get some 2 barrel intake manifolds for GMC engines.

Jerry - the Holleys are from a 302, not a 270. We occasionally sell a kit for one, but have never sold a complete unit. Not popular outside of the military crowd.

The BB-1 is most likely a 517s from about 1941; which is the most common of the Chevrolet BB-1's. The 517 uses the castings pictured. I have several, and no need for more, but thank you for the offer.

Jon