Brake Master Cylinder w/ Single Reservoir for Jeep/Willys 1948-1965 CJ-2A, CJ-3A, CJ-3B, CJ-5, CJ-6, 1946-1965 Willys Pickup w/o 3.8L, Sedan Delivery, Station Wagon, VJ Jeepster, Center of Bolt Hole to Center of Bolt Hole is 3-1/2", Both Mounting Holes are Unthreaded