Spridget Electrical part sale
Electrical
HOW TO CONVERT FROM GENERATOR TO ALTERNATOR
Created: September 16, 2005
Minis built up to 1969 (i.e. MKI  &  MKII) were positive ground while MKIII and onwards were built negative ground. The polarity of the alternator can not be changed, so if the alternator you have does not conform to your car, you must change your car. 
DISTRIBUTORS - working basics.
Created: September 15, 2000
To maximize power and economy potential from any engine, burning the compressed fuel/air mixture at precisely the right point throughout the engines entire rpm range is essential. This ‘point’ is generally somewhere before the piston reaches TDC on its power stroke described in degrees - i.e. 10 degrees BTDC.
DISTRIBUTOR - Electronic ignition
Created: September 15, 2000
Since the A-Series has such an efficient combustion chamber design, the standard points set-up is perfectly capable of providing sufficient sparks for effective combustion when new. And this is the problem. They require regular servicing to maintain maximum performance. This can be a chore, so is generally neglected.
Changing from Dynamo to Alternator
Created: September 01, 2000
Completing this change successfully, easily and neatly is pretty straight forward on a Mini. The alternator contains the regulator and cut out functions within it’s casing, so makes the regulator box used with a dynamo redundant. However, it is useful to retain the box itself and it’s connectors.
Alternator Conversion Instructions
Created: January 30, 2000
The polarity of the alternator can not be changed, so if the alternator you have does not conform to your car, you must change your car. If you bought your alternator from Mini Mania, it IS NEGATIVE GROUND.
Electrical polarity
Created: January 29, 2000
When fitting a new or rebuilt generator to your Mini, certain instructions will usually be found with it. These instructions advise the course of action to polarize the unit and are the same instructions for changing the cars electrical system from positive to negative earth or vice-versa.