CP is talking about the kindof over load coils that fit over the stock shock.
The right to left orientation may matter, depending on what springs you have, as some are biased for the right side. A bias design means there may be additional half leafs on the bottom of the pack for extra torque control. With six leafs, it sounds like they are not original, so we can assume they are somewhat new and not worn out. Additionally, since they were apart for blasting and painting, they may have put the band clamps on in positions that have created an imbalanced frequency or they may have put too many back on and the spring can't seperate enough to force the front segment up. The only time I've ever had wheel bounce in a mopar was when I was messing with the rear segment clamp position.
The snubber will help over come the bouncing, especially if your springs are weak and at or below stock height, but if the rear springs are set up to operate properly, the body seperation they create will prevent a snubber from ever contacting the floor, rendering it useless.
