These are new units, the boxes were only opened for the photo. These cylinders have a 7/8" bore. Many cars are now 40 to 80 years old and may have been modified over the years. WEBCO Brake & Clutch in Peekskill, New York.
For 1980-1982 Ford Thunderbird Wheel Cylinder Rear Dynamic Friction 95167XQRB
For 1988-1997 Ford Thunderbird Wheel Cylinder Rear API 36546JMVZ 1991 1989 1990
For 1988-1997 Ford Thunderbird Wheel Cylinder Rear Dorman 31146HP 1995 1992 1989
For 1983-1987 Ford Thunderbird Wheel Cylinder Rear Centric 58964MP 1984 1985
1955-1960 Ford Thunderbird Master Cylinder Cap AB-2162-C Filler Plug Assembly
For 1975 Ford F100 Wheel Cylinder Rear Right 24544GFZT RWD Wheel Cylinder