Just an update for you, I could not find any one that sells a kit, and the local FLAPS sell the Pitman arm seal. But, I did find that the Truck Shop in Orange CA,
www.truckandcarshop.com does sell most of the seperate items, seals, bushings, bearings, etc. They have a pretty good selection on various items, and the pricing seems good. The one item of interest, is the gasket that goes under the side cover plate ( it's actually on the top of the gear box ). It is priced at 39.00, and I'm thinking it's got wire mesh reinforcing or something. Nope, it's basically just a plain old paper gasket, but it's GM NOS. So, if you need the parts, buy everything else, and make your own gasket.