It is made from 1/2" alum. plate and uses 7/16" flathead bolts to mount the plate to the manifold, then a set of holes are drilled back 2.250" inches from the stock locating holes to move the supercharger back sealing the blower up on the manifold and helping the distribution of the discharge from the supercharger to be more centrally located in the manifold. Also the plate has been O-ringed on the blower side and includes a set of flathead bolts to mount to the manifold and O-ring.
RBS can supply the customer with studs if needed. The plate has been machined to lighten it up to keep the weight down on your hot rod.
RBS can supply the customer with studs if needed #900-0017.