alternator pully swap

This alternator will not be for street driving so it should be OK. Fingers crossed.
I also plan to use the constant output voltage regulator.
I did manage to get the pulley off, it was on very very tight. Didn't have the correct puller but with a small struggle it did eventually give up.
Next I'll take the alternator apart to see how the aluminum pulley can be pressed on without damaging anything?
I went to have this procedure done at a small business here locally like I have my entire life
but these shops are dropping out like flies. I suspect our town radiator shop will be the next to disappear.
Kind of disappointed I wasn't able to test the output before removing pully.