These brand new frame mounts are exact reproductions of the stock big block frame mounts and are ideal for a big block engine swap. You no longer have to scour the junkyards for a used set of these mounts. Sold as a pair. Use with stock 1968-1971 center bolt engine pads. Frame requires trimming on 1963-1967 applications. Can be used on 1972 trucks but will require the use of 1968-1971 engine mount pads.