zo6 cam
 

i got a hold of a new zo6 cam from a buddy that works at the chevy dealer. what kind of gain will i get from installing it in my 99 t/a with a few bolt on mods and flowmaster exhaust? will I need to change any of the valvetrian? can I have him put the zo6 ecm specs in my car? should I buy another cam instead? any help is appreciated.