a little bench seat help?

Hey guys, If any of you are bored enough to measure the distance between the mounting bolts on an early a bench seat, I would be forever indebted to you.
The story is I have a 66 dart with import buckets in it. My friend has a bench seat that he thinks might be from an early A. I am not near my car or the seat and sections of the floor have been amateurishly repaired.
So, I was inquiring if any of you might know the distances between the mounting studs and the overall width difference between an early A bench and a later 67 and up A body bench seat.
Thanks(and sorry, lol)