Do you know if they are DOT or FIA approved? Are they expensive?
I don't know of any aftermarket reclining racing seats that are FIA approved. Most, if not all are only the fixed back variety for FIA certification.
Besides getting a dash, I think you need to get a new center console or install a cup holder again. I have the exact same holes in mine. I think there was a popular cup holder option for that car back then...