Just thought I'd let everyone know that I posted a 28-page training filmstrip review book discussing the
1970 Distributor Modulator System, often referred to as the
'Dist-O-Vac' system. This was an emission-control set-up used not only in 70-72 F100s, but also most of Ford/Mercury cars and E100-300 Econolines. The book describes system operation and troubleshooting.
1970 Distributor Modulator System Film Review Book
![Image](http://www.fordification.com/board2/Dist-O-Vac.jpg)