Ok I have been looking at A-arms, is there any difference between the v6/gt arms, I read that the only difference between the gt and gt500 are the ball joints, now obviously I know if you buy an aftermarket one there will be a reduce in weight from stock to aftermarket, but in the end is that enough to justify that or would it be wiser to upgrade the bushings and go with a stiffer ball joint with the stock a-arm and I do plan on using the car for some NASA racing so that's why I am interested.