vikki,

i didnt know your gear was sooooo looowwww! you should get into the higher range. it will DRASTICALLY improve the power you feel. while in there you should install a posi. i'd go with a 3:08 and posi carrier for it. while the 400 can lay rubber with the 2:76's you have now when it happy, its not always happy is it? the higher gear will set you back in your seat better without the need for added power to do it!