I have the same problem in my 53 panel. I've been think of get seats out of any of the newer chevy trucks that have seat belt/ shoulder straps build into them. i have a friend with a chevy 1500 that has them but can't get to them yet with the snow. not sure how it's going to work out yet but that is my plan at the moment. i have some really nice seat in it at the moment from a conversion van but will give up the nice ride for safety.