Interestingly enough, I am pretty sure its in my old light blue Chilton's, also some older delco remy books. It is in section 6y of the 55 chevy shop manual under specifications. I will have to check but I am certain its also in the 57 shop manual. It must be in the later shop manuals. If its not, I would be really surprised, How else would you diagnose an advance problem.

keep in mind, it was not uncommon for a good shop to have a sun distributor machine to test the distributors. The technical information was also supplied by sun either in a card box or on a scroll on top of the machine. For some distributors, it was the easiest way to get a steady dwell reading was to set the points up on a machine.

Last edited by mdonohue05; 09/18/17 06:16 PM.