[Got the Bug]

Is there a seat adjustment handle under the seat?

It's possible (common mod) that the original owner removed the rails completely and bolted the seat direcly to the floor to allow for maximum room.

If the rails are in place and the adjuster handle is visible, you may have to disassemble it to check it out. If the rails have been removed, you can buy new rails from Hillbank.

Maybe you can rig something up so you can test drive the car. Good luck.