360 Tune Up

I plugged in the vacuum line to find that the diaphragm was open. No vacuum advance.
The vac cans are relatively easy to swap out. First couple times are the hardest, like most things.


The lack of vacuum advance would explain the higher temps cruising under load at 2400 rpm or so. Correct?
Yes it might.

It is supposed to get hot this weekend. So, I plan to do some more temperature testing. I have a new electric fan coming today and hope to get it installed tomorrow.
Are you running mechanical or electric fans now? In my opinion, the mechanical fans will generally get the best cooling. I think in part because the shrouding for electrics blocks too much of the airflow at speed. With mechanical, a hood seal and fan shroud help a lot at idle. I realize with your car, there just may not be room. So this may all be impractical blather.

What is the recommended amount of total centrifugal advance and the recommended total of vacuum advance? Is 34 BTDC about right?
At 2800 to 3000 rpm it would be about right for a typical iron headed LA. Click that link in my earlier post. Use the Direct Connection recommendations reprinted there. If its too small to read let me know. Next post we can look specifically at the timing curve you measured.