Dual Alt install?

[DA BIG ONE]

Wondering if I'll run into problems using a 140+ amp or higher amp alt w/my stock 105 amp alt?

[GMC Hauler]

Possibly. It's hard to tell if the voltage regulation droop curves are the same. About the only way to find out is to try and use an annmeter.

[AndyL]

You won't have any problems. They won't have the exact same voltage output, the alt with the slightly higher output will work the hardest.