PapaDisco, Look at using the rear seat from a modern luxury small car and installing it into your original seat frame. It might require a little stitching and fitting but will be very comfortable. In my 59 I used the rear seat from a '90 Caddy. Removed the original truck coil springs and replaced with the comfy foam from the Cadillac seat. Its not only much more comfortable than the old coil spring seat, but also thinner in the backrest so there is more room between seat and steering wheel. Having the fold down armrest is a bonus.
Mark
