dual alternator and batteries

hey guys, thanks for all the helpful information up to now.  i am an old timer, that installed back in the late 80's early 90's, and boy how the industry has changed. 

anyways, onto my question(s).  i have an 08 silverado crew cab with the 5.3L (non-flex).  i already have the second battery tray on the drivers side engine compartment.  i am looking at installing a Kenetic's 2400 as my secondary battery.  my question is, does or has anyone seen or made a bracket system for a dual alternator setup?  i am plan to run 8 kicker l7's and 2 2500.1 for the subs.  i will also be installing a at least one 650.4 for all the comp. speakers.  i want to make sure everything is getting the appropiate amount of power, so that i can run the amps (2500.1) at 1 ohm.  also is it recommended to run a isolator for the dual battery setup, or will running dual alt's, take care of that for me?

Thanks as always,

Troy

im not sure what you mean?  is this a trick question?  maybe im missing something, seeing how this is a 08 silverado. 

i dont mean to sound so condicending.