Sounds like you have a 86 and older seat. Here's what I have done in the past.This also works on the 87 and newer seats. If you can reach them pull the center cables off the seat tracks. Those control foward and aft. Take a small slot screw driver and put it in the gearnut part of the seat track. Turn the screwdriver until the seat track clears the mounting nuts. Sometimes you have to do a 1/4" at a time. You're in for a fun time if you don't have the room to reach those center cables.