After my planned improvements, I expect to be putting around 525hp and near 500 ft-lbs of torque to the rear wheels. I know the differential will be challenged at these levels. As will the axles, but I have a plan for those..

Has anyone done any mods or replaced the diff to handle this kind of power? I'd rather avoid a catastrophic failure if I can.

 

You may also bend the rear subframe at that level of power. Check out the engine swaps subforum to see what other people have done with their V8 swaps..

 

Thank you for pointing me that way, there's good info there, should have thought of that (not putting in a V8).