John Popelish inscribed in red ink for all to know:
RW Salnick wrote:
(snip) You won't need to make any changes to the pulley to make the

alternator deliver 24 V, but the the diodes and the diode trio will
need to be replaced with 24V versions.

(snip)

Are you seriously suggesting that a 12 volt alternator is made with a
diode trio that cannot handle 24 volts? I was under the impression that
few silicon rectifiers are made with a breakdown voltage less than 50
volts.

They need to be able to handle *at least* double the intended voltage
delivery. A 24 V alternator will probably actually deliver 28V (just as
today's 12 V alternators are delivering as much as 16V).

bob