I rebuilt the Hitachi carburetor on my 2.3 a while back. The following was the best link I found at the time on re-building it.

http://dimequarterly.tierranet.com/articles/tech_carb_tuning_guide.html

The rebuild wasn't quick, but I did get through it. Definitely have alternate transportation if you go this route (I think that is a good idea any time you work on your own cars - if possible).

I know this is a bit late, but did you check your choke or linkage? Why do you think only one side is working?