OK got my new set of ladder bars (Competition Engineering) for my 66 SS. Installation instructions very vague. Any one have photos of these on the car and here are some questions. What does the rear weight should be at normal postion when car is on jack stands front and rear, how is that possible? Install front bushing in top hole of bracket if rear of car has been raised, the rear is up due to air shocks and bags in springs, I assume that means the rear has been raised?