I just learned today, from old notes I had made regarding my pully set, they are from pre 70 model. Here we go again. Dip into the till of money for more parts. Was proceeding with post 70 setup because engine is a 70 model with timing mark on driver side. Only stumbled across notes looking for something else. I'm also running ATI damper assuming pully placement would be stock. I may be milling spacer as well before it's done.