Can 66 Fairlane bucket seats be used as cores for a 67 Fairlane? Are there any differences?  

66 and 67 should be the same. If, however, going from bench to buckets, it is not as simple as just bolting in buckets.  

Hey Iam  looking for bucket seats for my 66 do you know of anybody that has any.  

Once again, the original bucket seat cars have extra "crossmembers" built in to the floor and seat pedestals are needed to properly mount the buckets in place of a bench. There are some other small differences i've seen, but the above items are the two biggest.