For you big block guys, I have a nice set of cast valve cover spacers that I had machined flat so they'll fit nice and flat with no leakage. They were probably an old set of Ansen's... I glued a high quality VC gasket to the bottom side already, and painted them with silver gray tool box paint for durability. They are .900 inches tall with the gasket glued on. Not sure if a stock VC work with the spacers on power brake cars, you'll have to do some measuring to see, or maybe another kind Forum member could chime in with their experience. Asking $75 shipped in the lower 48... First one to PM me they want them gets them, and I'll take PayPal at no extra charge... Thanks for looking!!
John A, 67L88Vette