could someone please get me a measurement, bench seat 72 dart

Curious but did you try to manually slide the seat back? My cable/wire broke and I have to have my GF reach under the passenger side and flip the lever while I do the drivers side. Also make sure that you dont have one of the seat belt buckles wedged between the seat and the driveshaft hump, behind the front seat. I did that once and my seat was stuck all the way forward. Took me a few days to figure out what was going on.