[Spridgets] 1500 Fan Clutch question

[derf]

I have installed GM alternator #7127 63amp (or #7134 80amp) on 1275s
without too much trouble.  The 7127 was $30 with a lifetime warranty
from Autozone.
There are other alternator conversions that are more plug and play.

If the replacement parts are supposed to be press fit and do not stay
then I would abandon that avenue and go electric, even going as far as
upgrading the alternator.