How much to mill L92's
 

I am doing an L92 Escalade motor in my T/A, The AFM and VVT are getting removed and I am using an an aftermarket cam. I know this motor has 10.5:1 compression stock. I am looking to get around 10.9 to 11:1 compression ratio. does anyone know how much I will need to remove from the heads to achieve this? I plan on using the stock GM MLS gasket. The chambers are 70cc stock.

Your best bet is to let the machine shop you are using make the determination. Have them CC the heads and check the deck height and then they can accurately tell you how much they are going to take off to meet your goals.