I've got some questions regarding middle seats for a 60 Suburban. Is there a difference between the years 60 through 66? I've got a couple of leads,because they are out of state I don't want to blow it. The holes in my floors measure 24 5/8 . They say the holes are 34 1/2 from hole to hole. If you could let me know what's correct ASAP I can pull the trigger as they say.