Conrail inherited 50' boxcars from nearly every predecessor road. So many, in fact, that hundreds went into storage within several years of Conrail's creation.
The 132B class was built by Pacific Car and Foundry in 1967 as NYC 48360-48434. 58 cars carried their NYC number to Conrail and were renumbered to CR 230085-230142. Another 13 cars which had been previously renumbered to PC 265368-265425 became CR 265368-265425.
The 133B class was built by Pacific Car and Foundry in 1967 as NYC 78490-78519. Cars renumbered to PC became PC 360480-360506 then CR 360480-360506. The CR block of ex PC cars is not solid as ex EL cars were renumbered into the same number series. Cars that carried their NYC number to CR became CR 360803-360817.
The X56 classes of cars were built by the PRR at it's Sam Rea Shops in Hollidaysburg in 1964.