help 1964 Slant 6 tune ups specs

I just ordered a tach and dwell meter, and I want to get anal retentive and set my idle and high idle to the right specs. I do not have them under the hood. What is the idle supposed to be set for an automatic car? Also, what is the high idle setting, and does it need to be on the second step of the high idle cam? Also, my car has updated electronic ignition, what is the spark plug gap supposed to be?