Stop advance bushing
Ok Thanks cdminter59.
Looks like the MSD streetfire distributor I have (pn 8362) does not allow for the MSD advance stop bushing as it has no locknut/post on the bottom of the advance assembly as noted in the instructions you sent. I attached a pic showing where that post should have been.
I'll talk to MSD tommorow to confirm. I could go the way that F-Bird'88 indicated but I have a friend that has an application where he could use the distributor I have so I'm going to call my parts supplier to find out how much the MSD Pro-Billet 8365 is and I may go that direction. That unit will allow me to control both the mechanical advance with a stop and also has an adjustable vacuum advance (the stock 8362 does not).