So the truck we have runs great for the first 15 - 30 minutes/10 miles. Once it warms up, it just loses power and stalls. New plugs, new distributor and rotor, new ignition coil. I think it's the carb or the fuel pump. Any suggestions? Carbs for that year are really hard to find - near impossible.

 

First and easiest thing to do is to make sure that the wire from the carb choke heater is connected to the rear of the alternator; this opens the choke after a few minutes so the engine does not run rich.

Second thing to check would be that the choke butterfly in the carb moves freely, and that the choke heater is actually heating up and not burned out.

If the carburetor is actually bad - and the factory carb is the most complicated carb on the planet, and 32 years old now - best bet would be to get an aftermarket genuine Redline Weber K675 kit and install that; if you're in California, that's usually not an option unfortunately.

 

Hey Spydermom - I agree with Cusser’s assessment of the stock carb on the B2200s. If you must or desire to find a rebuilt original, you can probably get one here:
https://guaranteedcarburetors.com