My problem was that the shocks were too long limiting the travel of the wheels upward when I hit a bump, llike no spring at all!
The part that bothers me is that my shock is exactly what monroe calls out for for a 74 bettle. There is only 2.6 inchs of travel in this shock and this must be within the total travel range and the ride hight idealy is in the middle of the shock travel.
You should be able to center your supension with the adjustable beam but your shocks must fall between the limits of the ball joints, which limit your travel if you have no shocks at all. the off-road boys start with finding this ball joint center. they build in stops to prevent damage to balls or shocks which should not be limiting the travel in either direction.