Well, part of my problem is that I understand how a choke works, just not in relation to these carbs. Did the one you buy have an electric or manual choke?

 

Wish I could help you, unfortunately I'm not familiar with the earlier gen Monte Carlo. Here's a *bump* to your thread tho.

Not to tell you what to do, but you might get a quicker response in the Tech, or perhaps a section that relates more to the problem.

Hope you get your question answered!

 

Welcome to the Monte Carlo Forum. ?'ing the 305HO part, IMO, ALL 305HO's had 4bl carbs, not 2bl, which would make yours a non HO. Am I right here people? Lower compression engine. Probably lots of things you can do with that engine, but EVERYTHING on ANY engine costs $$$$, and IMO, a 350 would make a better starting point. Again, just my opinion.