you need the tranny, bellhousing & components, pedals, linkage, adapter for the t-case, diff. length driveshafts, and you'll have to move your crossmember(s) and you'll either need a new inspection cover (tranny hump) or you'll have to really modify your existing one..
I am doing a manual to auto conversion on a 77 truck that im building up and I have everything you could possibly need if you might be interested in buying the entire package.. I have pics, etc.. send me a PM/email if you're interested.. Im in so-cal
btw its a SM465+NP205 combo in excellent condition, no mechanical problems whatsoever.. I also have matching 3.73 dana44 & 12bolt if you're so inclined (or anyone for that matter) (blatent plug)
mike