I am I'm the process of doing the same thing in my '86. Front and back. I got seats from a '93 that are in awesome shape at the local pick n pull for $50 for both buckets, the back seat and all the hardware. The front seats were easy. The driver side actually bolted right in no problems, but on the passenger side all but 1 bolt lined up. So instead of doing the whole cut/weld/rig/pray I can get the old brackets on the new seat I just decided to drill a new hole which actually the floor was reinforced where I had to drill the hole so I just put a bolt and nut on that one. I believe it was the rear right bolt. I may in the future go under the truck and weld the nut to the floor just so I won't need two sets of hands if I ever do need the seats out. It doesn't have the tilt/slide feature but I can live without that. The back seat is a ongoing project and plan on making it a thread when I'm done. Hopefully it is successful as my scrappin buddy came by and scooped up the old seats and took them to the yard, I was gonna hold off til I was done but all well, more initiative to get it done.