advanced timing school please

This may help:

http://www.forabodiesonly.com/mopar/showthread.php?t=67882&highlight=degree

Basically, Remove the rotor, Pry the reluctor up (Screw drivers on both sides), Unscrew pick up and you'll have access to the advance plates.

Do you know anything about the engine? If you don't its going to take trial and error to dial it in where as if you knew you could jump to a spot and fine tune it.

If you want a plug and play distributor that uses the Mopar box and stuff I suggest a FireCore. (see post 12 of the above link for a kit if you have that version of the Mopar distributor or buy a FireCore)