The largest issue with these cabs (other than the width) is that the cab narrows a fair amount from the back of the cab to the firewall. Therefore, any bench seat you use is best "pinched" or narrowed at the front to correspond to the cab taper. If you don't do this, you are losing quite a bit of seat width. I used a late 80s Mazda B2200 bench seat frame in my 37' pickup that I first narrowed and then pinched. You have a little more forgiveness with buckets if you like buckets in a pickup.

- EM