I know what you mean... It was 1984 when I went through the Navy's basic electronic schools. I had to clear out the cobwebs a little, but it all comes back to you!

I have the parts I need. I found four 3.6vdc 20ma white LEDs. I did pick up a few resistors, but i think I am going to wire four of them in series without any additional resistance. Given that the rectifier/regulator puts out a nominal 14vdc anyway, I think i should be fine. The one thing I have to work out is how to mount the LEDs on a board that can still use the stock light socket. I have a decent idea, and will work on it over the next week or so. I'll post a pic if it works and looks OK.