One wire lock-up, 4 spd automatic w overdrive into A-body.

In my case it's relatively easy. The Sanden pump is already integrated into the serpentine belt set-up on the 5.9 Magnum, so under the hood all I have to do is install the condenser, receiver dryer and plumb it to the firewall.

There's a shop by my house that has every A/C fitting known to man. Once I figure out what fittings I need, I use rope to measure out the hoses, add some extra length and pick up the fittings and the hose. I then test fit and index every fitting, and finally take it back to the shop to have them all crimped on. Some need to be indexed, so I use a sharpie on the hose and fittings. Once the car is up and running, I bring it back to the shop and have it evacuated and charged.

The Gen 5 from VintageAir inside the car kit is pretty much a bolt-on deal with a few hoses, a easy to install vent outlet set-up and very few wires. The control panel will replace my factory heater control. It does require a relay under the hood, but I'm putting some of those under there for my headlights while I'm in there.

I put the same system on my 1970 'Cuda, 440 sixpack, shaker hood car, Passon 5-speed and you can't even really see it, as the A/C pump is under the alternator, which is an GM CS 144 alternator with HD diodes and extra windings. It puts out 115 amps at a slow idle and has a 225 amp, fused 2 gauge cable feeding a distribution block under the hood. They use them in trucks and Escalades.