My 72 442 convertible has a non matching 455. The numbers stamped on the block start with 32X. I know what the 32 stands for. I see the X stands for Kansas city. I am wanting to know what were these motors put in coming out of Kansas city, maybe station wagons. It also has J heads which don't sound correct for a 72 motor.

 

Fairfax, KS built full size cars only in 1972. Obviously the heads have been changed for later ones at some point in the past. You've got a frankenmotor.