This is the Intake to Exhaust Manifold Gasket for a Triumph TR6 1972 (Engine number CC750001) to 1976 and GT6 1968 to 1973. This range of gasket has a space between the intake ports of .950 of an inch. From engine number CC750001 (TR6 only) the intake port spacing was increase for a better flow and a new intake manifold we designed. At the same time they also improved the head gasket and went to a recessed block. If there is a question on what gasket you have just measure between the two ports.