[robnolimit]

No problem. You should center the housing, measure from the backing plate to the frame on each side. Make sure that you measure from the same place on each side, like a mirror image. Don't worry about the pinion being offset, the U-joints go side to side just as they go up and down. Centering off of the pinion may put the tires out to the left or right- not the look we're after.