Well webers seem to be working for about half the guys who use them, the other half hate them with a passion. I've been getting up to 22 mpg with my stock carb on my 20r, so that, and the fact that my goal is to spend as little as possible on the truck rule out the weber for me. If I got a free one I would probably try it... I got my entire truck for $250 so it's a little hard for me to spend more than that on just a carb.
Good luck...
got my truck for $250 too. yours probably didnt sit for a few years though. lol. im just discouraged cause i got my stock carb rebuilt already and i ended up wasting $135 on it.