I am trying to verify zero preload on my 36 in. S&W ladderbars.
On the scales I have equal weight on the slicks(840 lbs. each).

With the car on a level surface if I separately remove the front attaching bolts on either side the bars each RAISE UP evenly about 1/8 inch .
From what I understand this means there is little or no preload on either tire. CORRECT??? This would agree with my scales.
To get the bolt back in I have to put a little pressure on the top of the bar to realign the hole. I am in the MIDDLE hole of the front bracket.
Also the drivers side hole alignment is slightly offset towards the rear of the car and the passengers side is slightly offset towards the front of the car. I am able to realign them with a screwdriver.
Is this normal or should I adjust something to get these even and how would I do that?
Thanks Mike