I have a chrome accel coil. Mopar electronic ign dist and harness with a autozone box. The distributer is the new adjustable mallory one. I set the idle for the most vacume then drove it with the vacume unhooked and adjusted the mechanica, it didn't need much taken out from factory, till it quit knocking at any throttle. Then I hooked up the vacume advance and did the same thing, drive adjust drive adjust till the knocking just went away. I would have to check again but I think the initial ended up about 16btdc and the total mechanical was around 32 btdc.