70 Dart Swinger bench to bucket seat question

My 70 Dart Swinger originally came with a bench seat. I bought a set of bucket seats out of a 70 Swinger. I was going to lay down Dynamat last night and I wanted to find out what holes fit the seat tracks. None of the holes lined up with my tracks. Either i have the wrong tracks, or the holes aren't drilled in bench cars for buckets. It seems to have indents in the floor that line up perfect with the tracks. I wanted to hear from someone that has done this before I start drilling holes. Thanks!