Tlr 22 uneven ride height

[Gavin Collingwood]

When setting my ride height I notice looking from the front of the car, the left side of the chassis is always higher than the right.
The spring preload are all equally unwound as I've marked them on the collars. The bottoms of the shock shafts are fully wound equally to the same length.
Could the chassis be tweaked?
This is a problem I've always noticed by wanted people's opinions on it.
The problem is more pronounced on the front of the car
Gav