Except for the brushed finish on 70 and early 71 cars I believe all 70 and 71 column lock cylinders are the same on all Chrylser products without tilt column, possibly some difference in C-bodies, but I think all A, B, and E are the same. The 70 and 71 cylinders have a spring loaded ring around about half the diameter that holds them in the casting, the 72 and up have a pin about 3/16 in diameter to do this. If you think your column may have been changed you may want to take it apart before buying a new cylinder.

The ebody door lock cylinders are technically by themselves because of the pawl on the back which attaches to the lock rod. If you have your old pawls you can swap them onto the new cylinders.