After spending quite a bit of money on as much lightweight rotating Parts I could buy, I have a dilemma. Towards the end of the summer I hurt my 200, and this next year the car will be seeing a lot more track time so..... I decided to go 400 over the winter. I have a really nice next to New aluminum Driveline I purchased Last Summer, and I don't know if I want to take the inch out of it If i have to do to run the 400? Try to sell the damn thing and buy a new one? Or since the car will now be leaving off of the trans brake if I should stay away from the aluminum all together and have a chromoly one built. Any knowledge from the Wizards would be appreciated.