This is a seat out of a 93 that was in my truck I replaced it with a seat from a 82.

You will use the slider off of your seat and bolt it to the new seat. I also used a piece of flat stock and a small block of steel for a spacer in the front, I had to raise the front 1 and5/8 inches. In the back use the outside threaded hole that is in the seat to bolt the slider to. Then make sure everything is level and drill another hole in the seat frame to bolt the other side of the rear bracket to. At this time I also bolted a piece of flat stock to the treaded hole in the front of the seat frame.

Now take the seat and bolt it in the truck to make sure it fits and is centered. Now take the spacer and put it between the slider and the flat stock bolted to the seat frame and mark where it is located on the flat stock and the slider, also mark how much of the upper part of the slider that needs to be cut off (be sure to not cut past the dimples that keep it from sliding apart). Take the seat back out and weld the spacer to the flat stock and the slider, cut off part of the upper, bolt it back to the seat and put it in the truck.
This is the flat stock I used I think it was 1/4 inch. It was something laying around the shop.

This is the spacer and how much I cut off the upper.


Here it is in the truck.

When I finished the seat fit good but it is narrower that the stock seat so that is why I took it out. I hope this helps.