racers plz help my set up

well it runs 11.90 tranny has 3500 stall 904 ..engine is 10.5 to1 comp eddy heads, hughes hyd cam 560 lift,all forged,launchfrom foot brake ...leaf spring and snubber..hooks perfect so i dont want caltracks yet...im in a debate to either dofferent gears or tires or 100 shot