if fallout was real, that would be good business, modifying power armor for all those purposes, would probably be turned into a pile of meat and looted after the first day though
That would be one hell of a character, you enter an isolated bunker, you see disassembled suits of power armor on racks, disassembled stealth boys littering the floors, you traverse further, seeing more disassembled stuff, suits of power armor with stuff built into them but altogether non-functional, at the end you meet a very polite ghoul, he isnt crazy, he kindly asks you to assist him in creating the perfect power armor, he asks you to bring him Advanced Power Armor, Dr. Henry's research notes on the Mk 2 Stealthboy, a suit of CSA, a suit of T51b Power Armor, a Rebreather, a Mr. Gutsy flamer, a Power Fist, and other high-tech things, a long fetch quest with a lot of combat to get advanced tech. In the end he creates Hardened Advanced T51c Power Armor, and gives it to you, "I was to make the best armor for our nations greatest soldiers, this belongs to you now."