I just bought a brand new set of these (88958622) and was wondering if anyone makes a head gasket to lower the compression ratio? I'm also running a .581 lift cam and know there's gonna be an issue there. This is the reason for the thicker gasket. I've got a brand new set of hardened pushrods and springs in the 241 heads I have now. I'll probably sell the LS6 springs and the hardened pushrods once I get the right combo together and post them here. Give me some feedback. Thanks

Complete Cylinder Head with springs and valves.
Combustion chamber volume 60-61cc
Intake runner volume 250cc
Exhaust runner volume 85cc
Intake valve diameter 2.00"
Exhaust valve diameter 1.55"
Intake valves are lightweight hollow stem design
Exhaust valves are sodium filled for improved cooling
.055" machined from deck surface of head-Intake pilot pin bosses will need chamfered, and 7.325" pushrods should be utilized.
CNC Port work done by Lingenfelter
Special LS6 valve springs good for .570" lift
Will increase compression ration to 11.2:1