Playing around with choke high idle cam today and got it set to the 2000rpm recommended on the tune up decal, and it then idled at 1300rpm for the intermediate (I think it's supposed to idle at 1500rpm?). So I got some more timing readings while I was at it:
600rpm - 10* initial adv
800rpm - 11* mech
1300rpm - 20* mech
2000 rpm - 25* mech
Not sure yet when I get 30* mech advance. It seems like it is coming in too fast, so maybe I need to go with two heavy springs. I did open the HEI up and the advance was nice and snappy, seems like it is still well lubed.
Getting the vacuum gauge on it next and will try dialing in the vacuum advance with adjustment and idle mixture.
