Once the standard rocker covers are removed, plug the holes shown in the photo (1) below with clean rags to prevent foreign bodies falling into the lifter valley. You don’t want to have to remove the carburettor and inlet manifold just to retrieve a piece of old gasket do you? Clean the gasket surfaces up and trial fit our adapter plates. Two of the black countersunk retaining screws need to be relieved to clear the tapped holes used to secure the Chevrolet valve covers. Tighten the plate down and use a felt tip or scriber to mark the screw (2): I use a Dremel or a file to cut the…