Up to about 1966 the tube nut is a different size for front and rear brake lines to prevent mixing. In general up to about 74 outlets are right side (passenger side for US), left side after. Left or right outlets, and the size of the tubing nuts varies by model. Those are the only exceptions to the 1" bore. 67 Americans (and some 66 models) used a Wagner step-bore MC that had 1" for the front brakes and 7/8" for the rear, but I've replaced those with straight 1" bore MCs with no issues. 71-74 manual disc MCs (Kelsey-Hayes calipers) used a 1-1/16" bore. 75-76 all disc brake cars used a 1-1/8" MC, 77-78 just Matador used that one. I can tell you that AMC used a 1" bore MC for nearly all models. You may want a different bore size, especially if changing brakes. There are sometimes other subtle differences, so you shouldn't use a MC even if it bolts up without at least knowing the original specs and specs for the swapped unit. Bendix made a lot of MCs for both AMC and Ford (does Ford own a stake in Bendix?), and other makes and even types of equipment. The catch is they sometimes have the outlets on the opposite side, and you have to watch out for bore size. A lot of different Ford master cylinders will interchange with AMC. Some of those AMC applications WILL interchange with other manufacturers. 1968-'74 all models and 1975-'76 Hornet and Gremlin with power disc brakes (wire bail-type cap retainer).All pre-1968 models and 1969-'70 Rebel with power disc brakes (metal strap-type cap retainer).1967-'71 Jeep CJ and DJ-5 and 6 series 1-inch bore master cylinder, with dual drum brake system.1966-'67 American, Rambler, without power brakes with 17⁄8-inch bore master cylinder.DRW, 1973-'76 Jeep CJ series with or without power drum brakes, also 1973-'75 Jeep CJ series with non-power disc brakes 1963 Ambassador, American, Rambler, Classic with power brakes.1963 American, Rambler, Classic, without power brakes.1962 Rambler, American and Rebel, with power brakes.1962 Rambler, American and Rebel, without power brakes.1960 Ambassador, 1961 American, Classic, 1960-'61 Rebel, 1959-'60 Cadillac, 1959 Oldsmobile, 1955-'61 Chevrolet, Pontiac with Delco-Moraine master cylinder, with power brakes.1960 Rambler, Rebel, Ambassador, 1959-'60 Cadillac, 1959 Oldsmobile, 1955-'61 Chevrolet, Pontiac with four-stud-mount master cylinder, without power brakes.1955-'66 Jeep CJ5, CJ6 and J-series pickups with power brakes.dual rear wheels) 1960-'61 Rambler, 1955-'66 CJ5, CJ6 and DJ3 with a dual brake system, with two-stud-mount master cylinder and without power brakes
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