All, I recently bought a cheap old Rolls Royce shadow (actually traded it for a cheap old W123 300D). It has a blown alternator that shorts and smokes as soon as you connect the battery. A common conversion is a GM 10SI alternator.

The Rolls Royce has an external voltage regulator in the trunk of the car which has me concerned. From what I see WRT to the wiring on under the hood. There's a big wire for the charging with a smaller wire attached which I can assume can be connected to pin 2 on the 10SI to regulate the voltage. There is also a secondary set of wiring which I assume are for the generator light that I may keep disconnected.

What i'd like to understand is whether i should wire new cables from the battery (which is also in the boot) or if i could use the existing wiring and what to do with the voltage regulator?

Thanks

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With best regards

Al