You want to reduce the mechanical advance so you can have between 14 BTDC and 20 BTDC at idle and 30 to 34 BTDC revved up with all the mechanical advance in all the way up scope wrench
Try that and let us know your results and how that works on your car please luck
Have you or did you verify TDC on the balancer and with the #1 spark plug out? If not, you might want to up twocents grin

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)