where are the seat holes.

i had plastic race buckets in my car when i got it , it was a factory bench seat car. and now have picked up some 73 duster buckets for the car. the problem I'm having is i have 3 sets of holes drilled ein the floor but none of them line up with the studs in the tracks proper. just wondering how far the holes are from the door sill. if someone had measurements or a picture. thanks