Are all center bolt valve cover coil the same?
Make sure you're certain what covers you are getting before you buy them.
LS1 covers have two connector lines on the passenger side cover. Other ones (LS2 etc.) only have one line, and DO NOT support the LS1 PCV system.
If you manage to get your hands on non-LS1 valve covers, you'll have to change to an LS6 PCV system, or get rid of it entirely.
LS1:

LS2 (I believe):
Get these.
http://cgi.ebay.com/ebaymotors/Full-...ayphotohosting
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