I was asked for some photos of my modified seats. In summary, I drilled holes in the stock seat backs, welded some tubing in the frame and fabricated the head rests from plywood and steel. Added soam padding and covered it with Mil Spec canvas. Pretty easy project.
















Another modification was to the seat adjustment mechanism. I cut off the stock slide bolts and added my own that allowed the seat to slide beck further to increase the leg room for the drivers seat. It prodvides for about 3"-4" of additional leg room.