Do I need to upgrade my alternator with these fans?

I run those fans or close to them, with relays on a 26"Champion radiator with a Dakota Digital controller . Mine came out of a 2008 Mercury Cougar.
I also have a GM vacuum pump and MSD 6AL, and three aftermarket guages, allrunning on a 60A alternator.I have not had any issues other than some mild pulsing of the lights at idle rpm, though my headlights at driving speeds are as bright or brighter than most modern stuff.
I did use a headlight relay kit and alternator wire-around, both from member @crackedback, along with a Painless 8 circut auxiliary fuse box to power my accessories and take load off the bulkhead connector. My ammeter is bypassed by siimply moving both wires to one stud, (which can even be done without removing anything from the dash).
I will probably go to a higher amp alternator if this one ever dies, but not a priority until that happens.

Make sure your bulkhead connectors are clean and in good shape, and the mods to take load off them are a good idea.
You can clean connectors by mixing salt into vinegar and soaking them for anywhere from 5 to 30 minutes. Follow that with a dunk in baking soda and water to neutralize the acid. I was prepared to replace all mine, but they cleaned up so nice, I didn't change a single one.