Temperature thermostat for use in very early 1967 cars with 390 engines. 2-1/2 inches in diameter, 195°degree opening like OEM Ford. This is a Stant brand of thermostat.
Note, this is a larger diameter thermostat than the common one used on a small block and most Ford engines. Only used with the intake and thermostat housing with large size diameter of 2-1/2 inches.