Earlier engines have a square rope seal, later engines have the push on rubber seal. (metal ring with bonded rubber that fits over the crank.)

There are repair versions that have the seal lip a little farther out to fit past the groove.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.