I`d say the Air Grabber is not worth the weight, I always wished i could pull it off the Roadrunner but the rules of FAST would not allow it, at this time i`m unsure of the other differences but the NHRA stock class has the 69 about 100lbs heavier than a 68.
Dave Dudek 1st Factory Stock legal car in the 10`s!!! [/b] FAST & Factory Stock Rules: www.fastraces.org