Mario!
You can do a pretty good camber check with a carpenter's square with
the car parked on a flat, preferably level slab.
Put the short leg of the square on the ground outboard of the axle,
with the long leg standing up against the tire edgewise. Measure from
the edge of the square to the rim at top and bottom. These measurements
should be very nearly equal. If not, shim until they are. Be sure and
measure with bolts tight.

Use the same thickness of shims front and rear or you'll mess up the
caster, for which I don't think there is a shade tree method.
--
George Downs Bartlesville, Oklahoma