360 magnum

or, you could just buy one of my ready to go harnesses....

http://www.forabodiesonly.com/mopar/showthread.php?t=203010



couple of things.....you need an ASD relay, a fuel pump relay AND a starter relay. I use a small power distribution block that has 3 fuses and 3 relays in one box, keeps it simple and compact....don't reuse the old metal starter relay

you do NOT need to hack up your gas tank to run the truck fuel pump, you don't need to even cut it at all. pull out your sending unit, attach a 1991 lincoln LSC in-tank pump to it (same pressure/flow ratings, but small enough to fit inside the sending unit hole), and run the two wires out through a small hole/grommet you put at the highest point in the tank. done

the VSS isn't necessary. I leave it in my harness in case someone wants to hook up an electronic speedo, other than that, it's really only needed to operate the cruise control. I don't even have it hooked up on my car, it really isnt needed

I got 20mpg in my 4000+lb Fury with this setup going to the nationals, without overdrive. Imagine what it could do with OD in a 3000lb A-body