I take it you have the 25amp generator/regulator-on the-firewall set up at present. The 60 amp alternator has a built-in regulator and will not need the separate regulator box, it's bypassed with a cable/connector kit.
The kit can be had from RAM (posting by Recovry4x4 yesterday) for $15, I think, plus shipping.
The alternator uses the same bracket as the generator.