serious carb issues

just saw this...would this work to fix the problem? how hard would it be to install? i have heard some say that putting in new bushings is quite hard and can require machine shop tools i.e. lathe

http://www.summitracing.com/parts/QFT-10-2/

Just installing throttle shafts may not be the fix, the base is aluminum, its most likelt worn too, i would just bite the bullet & get a new base, NOW, AED has stock type base for around 100.00 bucks includeing 4 corner idleing, but for the little extra, you can get a billet like the one i showed you, installing bushings is not that bad, but the tool is about the cost of a billet base, Hmmmmm lol.