There is obvious logic behind this guys....I don't really understand why there is second guessing.
What do the quad shocks do? They control axial side to side movement, or a 'crab walking' motion if you will. What allows the rear end to move in such manner? Could it be the crappy control arms with rubber bushings?
Ever grab a stock control arm when the rear is out and shake it side to side? THAT is why you have quad shocks. Replacing the LCA's with a solid poly bushing and a strong box design, forces the rear to only travel in an up and down motion. Is this force still there? Yes, but it not as prominent, and is now forgiving.
Why the rubber bushings then? Because you have a solid axle, and when you turn, it twists. If you eliminate the twisting forces allowed by the rubber bushings, at a certain angle, the poly mounts will bind and you essentially 'bottom out' suspension travel.
Ford left quad shocks on these cars to compensate for that rubber bushing allowing the cars to maximize full suspension travel. If you run stock bushings and LCA's, you better damn leave them on. Wheelhop is only emphasised by no quads with stock equipment. Good aftermarket shocks do wonders. Replace your garbage and you won't wheelhop...ever. For dragging, all poly and solid is fine, some road racers may disagree but there are ways around that too even.