Well Matt,
I have a 300 & 3500S parts book, lets see if I can decipher it!
(It's not as easy as it first looks!)
The 3500 & 3500S rhd are both GMC307 and the repair kits seem to be the same as the lhd models, i.e. 605164.
Hope this helps and someone with a 2000 & 2200 parts books adds their numbers.
Regards, John.