How many duster "Twisters" are left out there? ours is a 71, 318, sport mirrors, NO HOOD SCOOPS (some site I was on said all twisters have the 340 scoops,..... not true). Dad bought the car new in 71. Shark tooth grille, was a904, but now 727. motor rebuild: 30 over, hyperutectic pistions, 340...