Its a goanna!
as in go Anna
In E. Tx. there is a small green Lizard that has red and yellow linear stripes with a long tail we called a sand runner---he was very fast on sand---lol
Wouldn't that be desirable if the car wanted to yaw (or spin)?
Jack, it is 72" from center of rear axle to end of sheet metal.
Aero Doug, to me---to most folks, "Motorcycle Doug" Robinson sized it up and thinks it probably doesn't need any tail feathers because it has enough flat vertical behind the axle.