Do I need to upgrade my alternator with these fans?

Knuckleduster, have you tried seeing how many amps your fans pull? But other than that looks like we have a pretty similar situation.

Trailbeast, thank you, didn't know it would be such a high spike, drove the cuda around a nit yesterday and didn't even get above 180 until I let her sit and got to 210 so I'm going to keep an eye on it, I'll let it sit longer and see if it even will go past 210.