I have just bought a Powermaster 17294, 100A max, 70A on idle, 12Si internal regulator type.
Fitting it and any upgraded cabling is a project for next year.
The electric fans and upgraded H1/H4 headlamps make waste of the 37A from the original '67 alt. With just the parkers my power audit came up with ~35A, without stereo or sub included. Lowbeams take it to ~43A.
