Hy DrPatrick, rather than use the term "2 ton", please use the model identification number 4400, for example. The most common master cylinder for that year is a 1 1/4" bore unit Raybestos p/n MC21698, available at RockAuto around $130.00. There are other master cylinders as well, 1 1/2" bore cylinders for heavy duty brakes or tandems, they have been made of unobtainium for a few years now, hope that helps.
