I remember guys running these cars in the 70`s, would block off the area just above the front valance.They would also use two front spoilers similiar to those found on TA`s. There were some that also ran a rear spoiler from a Javelin,and the word was that they worked very well. Since these are all cosmetic changes you probably wouldn`t be interested but the key was to get the air moving over and around the car.