Retired printer Michael Callahan wanted to join Bonneville’s 150mph Club under his own power, and found his answer in a 1969 Mercury Cyclone Spoiler II, one of roughly 503 built purely to satisfy NASCAR’s homologation rules. Most muscle car fans have never even heard of the car, despite its 8 Grand National race wins tying the far more famous Plymouth Superbird. Read on to find out how an obscure aero-war special ended up chasing land-speed records decades later.