[dsraven]

gotta have pics, thats how it works, haha.
welcome. nice intro with some info on your truck and it's intended purpose. some more info on the truck would be good. 55 is the year they changed part way through so there is a first and second generation truck for 55. the first is the advanced design truck and the second generation is the task force truck, totally different units, looks wise, but a lot of similarities mechanically. nice to have scored a v8 so I assume it is a second gen truck but lots have had a v8 installed where a 6 cyl once sat. since you mentioned a 350 it has at least had some rework done. the powerglide wouldn't have been stock either.
questions
-do you plan to do a power brake upgrade, if so, will it be a frame mounted unit under the floor or a firewall mounted unit
-do you plan to keep the solid axle with standard steering
-do you plan to use disc front and drum rear
-if town driving and possibly some towing consider what upgrades you will want over time and then work towards that end with any upgrades you do on the way there. no use spending money on upgrades that will be removed later. town driving is harder than highway driving if you don't have power steering. towing with standard brakes can be a little scary if the trailer brakes are not in tip top condition and adjusted properly or the trailer is not brake equipped

I really recommend a complete and thorough inspection of the whole truck before you start spending money. engine, cooling system, fuel system, exhaust system, electrical system, trans, clutch, brakes, frame, front axle and steering, rear axle, linkages, body, glass etc. get a really good baseline on what needs repair, if anyting, and then decide on how those repairs, if any are needed, will be carried out and how much the cost will be. what can be done together to save time and money etc. pick the safety items first, dont start driving it around until it is safe for you, passengers, and others on the same road.