Those look nearly identicle to mid-to-late 1980's Mazda 626 seats. I've used them in trucks before. But be aware the backrest is thick, and if you have a standard cab pickup it will restrict how far you can tilt the back cushion and how far you can slide the seat backward.

The following link shows a set of late 80's Honda Prelude seats in my '85 pickup (the blue interior):

http://www.geocities.com/toyotashawn/interiors.html

Those seats look more like Mazda 626 seats, but I could be wrong.