Norman supercharger for Holden Grey Motor

The Norman supercharger is probably the most well know supercharger for the Holden Grey motor.  These days there isn’t alot of them or information around but they still pop up from time to time.  There were a few variations including water and air cooled variants. 

In a recent Street machine article there was a FJ that many years ago fitted with a Norman charger ran a 12 second quarter mile.  That's quite impressive for a 2.3 litre motor build in the late 50's

Here are some pictures: