i'll be using 10mm bolts and why do i need to jack up the car to do this?
it's all about how the car is currently sitting like this "U" while it's on the ground.. if you jack it up off the ground from the center, it will sit like this "_".. just look it up for a better explaination.. the frame & everything is sitting differently while it's on the ground vs. when it's jacked up on center.