Ok, I am assuming you have an automatic transmission, First thing I would do is give the thing a complete overhaul, IE new oil, flushed and Filter. I would also check all your linkages and make sure you don't have any that are bent. Seatbelts, I think you can swap that out in a pinch, As for your seats you may have to do some checking around, Until someone here has built a bracket to accept most seats minus the rails. **Shrug** Haven't messed with seats yet. OR I live in eastern oregon and know a pretty decent upholsterer here, B&B Upholstery. Good guys.