LT1in a 57. alternator wiring help needed

[57kansastruck]

I installed a LT1/4L60E, in a 57 3100. The engine runs strong and I'm buttoning up the remaining issues and readying the truck for paint. I researched online on wiring up the alternator, and learned that I need to run a 12 volt switched positive lead to the alternator, to the exciter. This "turns on" the alternator. I read that the wire needed a 470ohm in line resistor. I went to radio shack and bought a 470 ohm resistor. Not knowing which "watt" to buy, 1 watt or 1/2 watt, I bought both. I soldered in a 1 watt resistor. The plug from the original wiring harness has only 2 brown wires. I could only find online that the "L" terminal was to have the 12 volts with resistance. I did that and have no charge from the alternator. I'll remove it and have it tested, just to make sure it works, and rule out a bad alternator. But I believe it will test okay.
Has anyone out there had any experience with this? I would really appreciate some instruction and advice. Pictures would be amazing. Thanks in advance. Jason