The numbers stamped into the top of the block are 5257. The factory plating is still in nice shape with the proper goldish green sheen. The casting is in great shape with no breaks, repairs, or modifications.
Genuine Holley 108-90-4 Holley Carburetor Metering Plate Gaskets Non Stick 4160
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50mm TBI throttle body to 4 barrel intake manifold adapter fits Chevy GM Holley
