When I assembled my 572 Keith Black I removed the o-ring wire from my set of Indy 440-1's and used a standard Felpro gasket.

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