If the alternator is OK you should be able to get a replacement regulator from an auto part store. If you go to a GM Delco there's a few things to consider . Dual pulleys are ideal but I doubt you can use your chrco pulleys. Delco single wire alternators are popular on bush equipment and race cars for the simpicity. I'm running one in my 265 Chry Ind. that has a self energizing regulator installed. I ran a #10 wire over to my solenoid and put a Voltage Guage on my dash to replace the AMP guage. As long as I have 13.8 volts I know I am OK. No need for the other wiring and I guess that is a bonus when you are out on the tundra..On the GM's they ran the #1 field wire to the idiot light on the dash and then on to the cold side of the ignition switch. On my 4x4 suzuki truck I put in a bulb with 10 ohms res and it seems to be working ok, like it would on a GM. I turn the key on it lights up and as the motor starts, the regulator cuts in and drops off the power to the light on the dash.The #2 sensing wire then goes to the battery or in my case I put a short jumper to the main terminal.
