6.1 valve covers on a 5.7

I have searched for this topic on google and found one link but it never really stipulated what parts I finally needed. Surely someone on here has done the mod and can tell me the exact part numbers I need. This topic (see link below) sort of helps me but at the same stage doesn't......

http://www.lxforums.com/board/f74/6-1-valve-cover-covers-5-7-question-224952/

I have got the:

4 x 5037581AB which are the little black studs (2 PER VALVE COVER)

I then read I may need the following as well:

4 x 6508330AA
6 x 6508861AA

Can anyone confirm this?

Here is a picture of the standard 5.7 studs


And this one shows the 6.1 cover lining up with the existing 5.7 studs, clearly won't work but can't see where new studs would even screw in to on the engine to suit the 6.1