The "On/Off drive unit" includes most everything on the front
of the motor,Including; Serpentine drive with bracket, compact
chromed components (PS Pump, AC Pump, Alt), and the electromagnetic drive unit itself.
The drive unit is designed to bolt right up to a 351C engine.
When we build a car we do use an actual aluminum blower housing, and recommend that others who use our parts do so as well. The best part is, the Pulley is powered by the serpentine belt and cogged belt that get their drive from the crankshaft pulley, so your blower runs at the actual RPM of the motor (unlike the electric motor setups many folks try).
Also, you can still have functional AC, and no electric motor in the blower case!!!
If you would like to see it in action you can see the drive going in this video below:
Here is a video showing it in close up detail and how it works:
www.youtube.com/watch?v=vIpUX0qUxJQ
If you are wanting everything from the engine up, you will find the other items needed listed separately in our "Max Accessories" item listings (i.e. the Scott Superslott hat, Vintage Weiand Swing Arm Front Cover, Drive Pulley, and so on).
