New engine has AC old engine did not

If all you have is the compressor from the 5.7, you'll need a lot of additional parts. Condenser, evaporator, receiver dryer, expansion valve, associated plumbing, new heater box, dash controls, wiring, hoses, dash vents... You'd be better off buying a retro-fit AC kit if you really want air conditioning. In Wisconsin, it may be more trouble and expense than it's worth.