How-To: Convert a Land Rover Series Truck from a Lucas Dynamo / Generator to a GM Alternator

Alan J. Richer wrote this article that was reprinted on the Land Rover FAQ.  It is about switching a Series truck to using a General Motors alternator:

"The subject at hand is going to be switching your car from a Lucas dynamo to a GM internally-regulated alternator. These are inexpensive, one-package solution to the low output current problem of a 20-amp dynamo. This is done by removing the dynamo and its associated control box, jumpering the wires which were once connected at the junction box to allow 12 volts to get where it needs to, installing new wires to connect the GM alternator into the car's electrical system, modifying the mountings to accept the alternator, and mounting and connecting the new alternator into the system."

In addition to a how-to, the article provides some good reference tables and info.

See also another article on installing an alternator in a Series IIA truck.