I'm not sure what you mean by "roll" but if that means drive then yes I drive my truck and I'm sitting on the djm front and xii rear composite leafs plus a block to give me a 3/4 drop but I am c notched. And as far as racing I do race it from time to time and with this set up its as stiff as if I had qa1 at max stiffness so I don't get too much wheel hop as long as its a clean smooth road. If you are doing just a 2in I'd go xii street drop that was my previous drop and it was the best bang for my buck!!!!
Ps your auto parts store just carries a universal aluminum block kit and under some weight those could buckle I'd spend a little more and have a way better drop with the xii…also to avoid wheel hop and breaking something I'd high suggest a traction bar it'll also improve your launch for racing and I have one for sale!!!!
Xrunner lowered on xii street drop
Xrunner with djm drop