Installing an American Autowire Classic update wiring harness

I just recently purchased this kit and read in the instructions that I can't use my 3 wire Toyota alternator that charges superbly at idle, even thought it's probably only 60 amps or so. In the instructions say to use a 1 wire self-regulated alternator. Anyone have a a recommendation on a good high amperage 1 wire alternator that can be retrofitted toa small block?
You should still be able to run that alternator, just add a few more wires for the regulator.