Either situation...

is the install as simple as adding the battery...

OR

Are there other upgrades that need to be done (New alternator)

Thanks in advance...

 

I don't think anything has to be done with the alternator, but make sure you install a dual battery isolator for a 2 battery config to save the stress on the alt. The bigger battery mod has been discussed on the board if you look for it.

 

was thinkin of a larger battery n relocating to the hatch...dunno though.