Fast Eddy, cam bushing Go & No-Go gauge pin

No. 13: For cam bushing in cam cover. Also fits 49-57 B.T with updated cam, bushings that are reamed out for 0.8125" aftermarket replacement (which is standard aftermarket cam dimensions for 48-69). Dual end gauge pin, one side is a Go other side is No-Go gauge. Used to check if the tolerance of the bushing/bearing is within spec, or that a replacement is in order. For a quality job without guesswork.