In 1996 Jim Deist told me 30 feet back from CG, 7 feet above the ground, pull a line with a string from your vertical and longitudinal CG, where the string "exits" the car is the best pull point. Put the anchor loop on a roller to prevent friction break as the line snaps into pull. It worked perfect every time.
He said the 7 foot number was due to chute interaction with the ground.....not a good idea.
This is from memory, folks, and the 30 foot number is a little fuzzy...might have been 35.
Someone please correct me if I'm wrong. Thanks!!
Regards, JimL