Centering rearend in 89 fox

What steps to take to center my rearend..It has double uppers and lowers.
Thanks

Pull from the front of the fire wall trans tunnel to the lower controll arm mounting and square it up then put your driver in the car loaded on the suspension and add a 1/2 to full turn of pre load to pass side. Point pinion nut to trans.... should get you close and have the rear square in chassis

Ok thanks

I always make the rear lowers the same length. These set the wheelbase. Then you can set the uppers the same and if you turn the uppers equal amount of turns in opposite directions you can slide the rear in the chassis left to right. Once it's centered load it to full race weight and set preload as mentioned above...

What's the average wheel base that an oe fox with double adjust able lowers in the back and caster camber plates up front can get? Or what are u guys running?
Thanks