Webers are ok but they will not out last a Stock Aisin Carb. , just my opinion , and I know others will swear up and down that Webers are all that but in my opinion you can not beat the stock Aisin . They may not out perform but they will out last if well maintained !!!!!!

    now how do you know??   you had your weber on your truck for maybe a week   and  you never did  have it jetted to match your 20R

You can get an adapter to run a holley 500cfm 2 bbl, but I agree that you're better off sticking with the stock 22r carb.  I personally run a weber 32/36 and do not particularly care for it, especially if you sneeze or lean too close to the door.

500cfm  on a 22R    i hope its got a stage 5 head and cam on it 



ive had my weber for about 5 years i guess,  had  some issues  when i bored the engine to .060  but after installing some bigger fuel jets  it  runs perfectly

in fact  Insane06  commented on how smoothly  it  idled up  after warming up  from a cold start

carbs must be tuned,  i dont know how to tune a aisin carb  but i DO  know how to tune a weber