After many searches on dual master cylinder upgrades, the Cherokee unit comes up most frequently. While this is reported to be a nice upgrade on 53 and older trucks, 54 and newer have the master cylinder mounted on the frame rail above the removable transmission crossmember. The Cherokee style master cylinder has a tube sticking out of the cylinder that binds with the 54+ linkage (As I found out the hard way). Thus, I used a universal Corvette master cylinder from Speedway Motors and a Cherokee