The  Ghia-built Dodge  Firearrow roadster  first appeared  as a two-seat  mockup  that  rode atop  a '54  Dodge chassis.  Bright red and  circumscribed  by  a  dramatic gray  molding  that  culminated up front in a  handsome, blade-like  bumper split  by a  single (and rather phallic)  pod, Firearrow  I carried  dual…