If I buy a new one, I'm getting a Motorcraft one.

Does anyone know the difference between the 6 different lock cylinder part numbers on Rock Auto? Orielly is the same way.

http://www.oreillyauto.com/site/c/se...150&vi=1122286

RockAuto Parts Catalog

MOTORCRAFT Part # SW2398 {#F3DZ11582C}
No. 3 Cut Letter C

$48.79 $0.00 $48.79
MOTORCRAFT Part # SW2399 {#F3DZ11582D}
No. 4 Cut Letter D

$48.79 $0.00 $48.79
MOTORCRAFT Part # SW2400 {#F3DZ11582E}
No. 5 Cut Letter E

$50.79 $0.00 $50.79
MOTORCRAFT Part # SW2396 {#F3DZ11582A}
No. 1 Cut Letter A

$50.79 $0.00 $50.79
MOTORCRAFT Part # SW2397 {#F3DZ11582B}
No. 2 Cut Letter B

$50.79 $0.00 $50.79
MOTORCRAFT Part # SW6383 {Includes Tumbler #1L3Z11582A}
From 8/30/95

$58.89 $0.00 $58.89