Larry is right. The PES is a BIG valve cover. It can hold a stud girdle. The adaptor is needed to mate the valve cover to the head. I sell them as a kit.

It is like having 2 BBChevy vlave covers welded together. It seals with a rubber oring for the gasket.
http://12bolt.com/250292_products/valve_cover


Here is a video showing the machining of the bolt pattern on my CNC.
http://youtu.be/_cMs68MwBfI?list=UUMGvkFVBkT2vJwIfZ2HTnKw

Last edited by tlowe #1716; 12/01/14 09:20 PM.
Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com