1958 GMC 100 - carb issues

Hey everyone, new to the forum here!

My grandpa bought this truck brand new, it's a 1958 GMC 100. My grandpa is now 94 and he can't drive anymore, so he gave this beautiful truck to me. I plan on keeping it exactly the way it is, no customization or mods, just replacing what wears out with stock parts to keep it as original as possible.

my question is regarding the carburetor. It's a rochester 7013069 two barrel with a manual wire choke. My grandpa told me that it is not the stock carb that came with the truck, he said that it was off a Buick.

I drove the truck a couple years ago with this carb and it ran great. It sat for a while before I picked it up and it barely runs now. Took it off the truck today and cleaned it the best that I could, but when I put it back together it still didn't run right.

My question is... does anyone know the model of the stock carb that came with this truck? It is a 336 V8. I really want to find the stock carb and put it back on, if I can't ill try and rebuild this one but the threads inside the carb where the fuel line connect is stripped and fuel leaks out. Not good.

I tried to upload a picture of the truck but it failed... i'll try again later
Thanks!

 

Hello that is a sweet truck you got there. I saw the pics in the intro section. Killing two birds with one stone... Welcome! I can't tell you what model you had but judging by the numbers you posted it sounds like a rochester 2GC. Mine is a '59 and runs 7013007. They are easy to rebuild and maybe yours just needs a cleaning. Maybe your bowl in gunked up or maybe you have a blockage somewhere. You can cross reference your year truck, and engine to a rochester carb. A 7013069 carb could have come on that truck maybe last time your grandfather did a rebuild he swapped in another of the same model.

 

G.M.C. used Stromberg type WW sales number 380499 on both the 1958 and 1959 336 engines. The G.M.C. part number is 2367348.

As these carburetors are quite scarce, it has been common for years to swap a Rochester onto the engine. But the original would have been Stromberg. The Strombergs can be found, but they are fairly expensive.

Jon.

 

I know that the Chevy / GMC trk 283 cu.in. 1958,59 used a 2G rochester 7012035 or 7012047 , I checked my strombergs got a WW 23-147 but thats for a 1962-67 GMC trk

 

GMC continued to build their own engines through the 1974 model year.

The very first GMC to use a Rochester of which I have any record is the 1974 GMC motorhome with Olds 455 engine.

Before that no Rochesters. As stated earlier, common to do a swap due to expense. GMC and IHC tended to use more expensive components that Chevy or Ford.

Jon.