LS3 accessory drive question

[JimLev]

I need some schooling!
Is there any reason the stock LS3 alternator and AC compressor can't be used?
Looking at some of the aftermarket ($$$) kits it looks like you still need to buy a different harmonic balancer and water pump.
I don't need all chrome parts, the hood and side covers will be on 99% of the time.
Also don't need the PS pump either, I'm getting the electric steering.
The Alan Grove 144R AC bracket should work with the Sanden compressor, just not sure about an alternator bracket.
My harmonic balancer is a Corvette 1997-2013, with 1.5" space from the front of the balancer to the machined surface that the bolt screws into.