tt69camaro

I've been searching but haven't found any data on the new 6speed automatic trans. I WILL be modifying my G8 shortly after I buy one and wanted to know how much horespower the automatic trans will hold without failure vs. the manual transmission? Is it too soon to tell or does anyone have any data on HP limits? I am curious about the rear end as well. I will probably turbocharge it looking for around 600rwhp. I want to know if the auto or manual is stronger in the stock configuration and how much the rear will handle as well.
Thanks