read the old chrysler race manuals. they say to do it w/ the car jacked up level and squared up even if u have to put shims under the jack stands, it should be level. your suspension tweaking(s/s springs or what ever) any preloading ain`t right if the car is welded up twisted. if it`s done right, the engineering in the s/s springs (for instance) will be used correctly. :-k
