Could the legal issues be resolved by simply stamping "for off-road use only" on them? Or perhaps a sort of contract signed by each buyer waiving the fabricator and designers involved of any liability.
99 SE V6\5spd - 156 HP\157 TQ 15.166-90.84
Totaled 02/12/06
99 SVT # 1571 - 175 HP\153 TQ 14.999-91.88
Born 3/24/99 Reborn 3/18/06
Pietenpol Racing Technologies project vehicle
90 Festiva L 5spd, Blue(not for long), 103k