1965 Dart Seat Track - drilling new holes & do these tracks have height adjusters?

Done. 1965 Dart Seat Brackets direct mount to the procar slider rails on the procar copycat seats. All I need to do to the dart seat rails was knock off the rear stud. And I drilled 4 holes in the dart floor for each seat. What I do notice is the seat is flexing the floor. I think the floor was flexing before so .... I'm going to need to reinforce the floor be I get on the road.