Good luck to you James !!
I can skite at a Rotary meeting some time about how I helped a guy on the other side of the world fault find his electrics on a car that didnt even come to Australia ( we dont have turbos here).
Make sure you get the reg that gives you the highest output (amps) that you can fit to that alt.
You have just done a job that an auto elec would charge $$ to do & he would probably have just sold you a change over alt that you didnt need.

__________________
Grumpy Old Diesel Owners Club group

I no longer question authority, I annoy authority. More effect, less effort....

1967 230-6 auto parts car. rust bucket.
1980 300D now parts car 800k miles
1984 300D 500k miles
1987 250td 160k miles English import
2001 jeep turbo diesel 130k miles
1998 jeep tdi ~ followed me home. Needs a turbo.
1968 Ford F750 truck. 6-354 diesel conversion.
Other toys ~J.D.,Cat & GM ~ mainly earth moving