Single field Alternator rebuild

Hey guys
I'm dropping my alternator (68 barracuda single field) off at a local shop for rebuild.
I've owned the car for 7 years, before me it was stored for years so might even be original alternator.
Is there anything I should tell the shop when I drop it off?
I'm assuming my alternator is 55 amp .
I'll attach a picture of my current alternator
Thanks