Hopefully this helps, I think that I must be having a brain-fart and completely missing the obvious, but I cannot get the front seats into my 72 std. They are the style with the two side rails, and the notched "fingers" on the inside. The seats match, as they have accomodating slots for the rails and the lever which lowers the mating fingers into the ones on the rail. The seats however did not come from this car. I can identify how they will work once in place, but have tried fighting the seats on from the front...rail hits up against the back of the lever mount on seat and stops everything, from the back...seats just pile-up into the floorboards on either side and get stuck, prying, hammering, and they will not go in. If anyone can offer insight, I would greatly appreciate it, as this is the last piece of my build...from the body up, and I can't wait to driver her. Thanks in advance.