Do I need the radiator?
Should I get the fuel tank from the Taco or maybe just fuel lines?
What about a the a/c system? Anyone ever swap that into their old trucks, I mean if I can get it for free?
1:You need the radiator that came in the truck you plan to drive (82'). You DO NOT need a larger one like BigMike has. I run the stock 85 one. With a BlackMagic E-Fan.
2:100% yes the other option that I like is cutting off the old mounting flanges for evap and the pump from the donor truck (96') and welding them into the 82' tank.
3:Yes, except the condenser.