86 b2000 webber carb isssue

hey all

so recently put a used webber 32/36 carb on my b2000 and wonce i got it adjusted to run and idel "propperly" it now blows smoke when ever i hit the gas. some times its white some times black but 90% of the time its blue. i know what the coloring means, blue is oil black too much gas, white blown headgasket but wtf would make it do that. i belive it has to do with the carb not the engine


any advise would greatly be apperated

thanks
justin