Overdrive switch on Gear Knob

[Phillips Kevin <Kevin.Phillips@TIDV.dti.gov.uk> (Tel DTI Assessment Unit)]

A question re overdrive switches - 

In my search for a Roadster I've driven Mk1's Mk2's and The later post 74 
Rubber 
Bumper cars - although I've decided on a chrome bumper model it seems that the 
location of the overdrive switch on the gear knob is a post chrome innovation. 

I really like the switch on the gear knob and would like to know if it is easy 
or indeed possible to move the switch from the dash on a pre '74 car onto the 
gearstick ??   New gearstick and knob at least I assume !

Kevin.