ease up guys, its not my rig, as I said I would do things diff imo. As far as I no, I would be reasonably happy with dominellos box on paper, new stronger gear sets, pump etc. im new to xrs, and still looking for my one, and as far as ive been told its t56 manual, or a dominello box for 400rwkw and over is good, couple of others swear buy that combo for 500rwkw, as for big numbers, yes I bigger tranny is needed, but if you read earlier, he is over it, wants to drive it enjoy it a bit, we will see how good it is, big torque, so yeah if it was me, yes jatco for the od, or t56 mani, he is trying to palm it my way but a little out of range for me price wise, and still need to spend money, bigger cooler and plumbing . We will see once im shotgun.