For sale is a set of lightly used LS valve cover spacers. They are 3/8" thick. Want to run larger rockers and don't want to buy new valve covers? These will do the trick. Machined out of billet aluminum and come with the required longer bolts and spacers. These worked well for me when I installed Comp Pro Magnum 1.8 ratio roller rockers.

$85 shipped to CONUSA.