Sounds like the tumbler locked up. Take a pair of nedlenose vise grips, lube the cly, clamp the key and start shakin, twisting and so on, just dont break the key off. Once you get it to turn, remove the cly. I've gotten all but one to turn with this method.
Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.