I currently have the block and AAL that comes with the 6" Fabtech lift on my '03 D-cab. I also have a pair of Explorer Pro-comp traction bars. I'll be replacing the blocks and AAL with a new leaf pack. When I do I won't need traction bars but I may just may just throw them back on because they were expensive. Will this type of traction bar have any bad effects on the new leafs? I thought I read something about this either n this forum or another but can't seem to find the thread to verify.