you can save a bundle and forget the kit.
the alt itself can be had for as little as 35$ from an auto store.
the lower gen bracket on a side mount is the basis for a lower bracket for the alt.
you can buy an generic upper bracket from a auto store.. one with a mount hole and a slot.. or just cut your own, then mount up.. make sure belt and pulley are correct.
if your wireing is a birdsnest.. simply rewire...
5-6' of wire handles a regular N setup.
if it was me.. I'd avoid the 1 wire jobs.. and go 3 wire. besides.. many times the 1 wire jobs cost mor ethan a 3 wire.. and on a 3 wire.. it's really a 2 wire as 1 of the 3 wires is 2" long...