The chrome hoop bumper is still looking pretty good on this '68 factory four-speed V-8 Firebird. Unlike Fords and Mopars, GM body number and VIN tags don't offer much specific information about engine specs. It drives us nuts. Still, the Bird's VIN reads 223378U169810. The number 1 in the eighth position tells us this is an eight-cylinder car for sure. A number 6 would indicate a six-popper. Was this a Ram Air 400 car? Only the long-gone paper trail holds the truth.