My b2200 runs rough just at idle

so i have a 93 b2200 it has the stock carb. i tried cleaning it and i did a tune up but it still runs rough! but its just at idle once it gets moving its smooth as silk i think its the carb what do y'all think? i have a weber 32/36 siting around i think i will put that on there with the adapter plate and see if it fixes it. i jet wanted mother opinion to see what else it could be. thanks any help would be appreciated.

I'd snug up all the carb attaching nuts, and check/double check for a cracked or loose vacuum hose/fitting (there are a zillion of them). Don't overlook hoses going to bottom of air cleaner either, or the thermo valve under the intake manifold.

I had a rough idle on my 88 when I had it, was shaking at idle. It turned out to be a vacuum leak, but it was a faulty vacuum valve. I started pinching vac lines with needle nose pliers when it was idling (after verifing no hose leaks), and when I pinched one hose, it idled smooth all of a sudden. Out came a screw that fit in the end of the vac hose, and off I went lol, it was for an emissions device, and we don't have testing here.

Wow I've gotta try pinching off my hoses maybe thanks for info