I guess I should add this. Every non chassis door car is always drivers side heavy. Even though I tried to put everything on the right side, mine is still 1% heavy on the drivers side. Most cars I've seen on the scales are off even more. That being said, now lets scale the car. Guaranteed the right rear is light. If then car hooks well it will drive to the right. Two ways to change it. Add weight to the passenger side. Or add some preload.
Doug