I'm making right under 450 crank Ft/lbs with stock axles.
That's with about 485BHP on stock axles, too.
Why worry until you have proven you NEED them? You've got enough money to dump in to your project right now. I think axles should be the LAST thing you are looking at. Look in to an LSD, a beefier clutch, and a built tranny. THOSE will cost more, not to mention your freakin M400! GOOD LUCK WITH THAT!
You want real advice? go for it, but spend your money where your cost:benefit ratio if the closest. Axles ain't it.
