Somebody know what parts are needed to replace 30mm carb on an 02 250 trailblazer with a 34mm off a 400 scrambler????

 

Welcome to the for....I dunno but someone else might....

 

You will need a intake manifold also had to use the needle jet and needle out of the 30mm carb because the mid range was too lean.
I got my manifold from Hpd. Also will need the brass choke fitting for the 34mm carb,the one off the 30mm is different size.