The original Corvette seats leave a lot to be desired. They are narrow feeling (at least for me!) and do not have any adjustment for the angle of the seat back. Pontiac Fiero seats are a popular source for a seat swap so that's what I decided to try. The Fiero seats are much more comfortable and the seat back angle is easily adjusted. I just happened to find a pair in dark and light gray that match the new interior pretty well.
I had to make new seat brackets to bolt them to the original bolt pattern.
I had to make up a 'squaring jig' to ensure the brackets lined up with the holes in the floor.