The carb is not that hard to work on, but you have to have the manual to do it right. I'd suspect the fuel delivery based on what you describe, and I'd test that first. Fuel filter and fuel pump, and the fuel pickup in the tank, especially if the truck sat for any length of time and let the fuel varnish up, or had some water condense in the tank.

One common carb problem is the bowl vent valve. See the tests in the fsm's that montymcv has on his site. Go thru that, and we can make it run. I'm not a fan of webers on these trucks. Too much fuel slosh and choke out on a grade with the bad bowl location. To me, it's an idiot fix, just like the time I put a Holley spread bore on a Mercedes 280 to replace the solex spread bore clone with the warped top cover and the broken rear needles cam. I was a real DA on that one...

BTW, all carbs are haunted, which is why FE is an FI fan. What do you expect from something that meters fuel by mimicing sucking on a straw...