I wish I had my engine out so I could post some pictures of mine. It cost 200.00 some dollars and can lay right on the headers. It measures about 1/4 inch thick. Inwill be picking up another one for my big block soon from our track manager as he sells them for cost.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time