Kept the IRS of course! Actually, I set aside the complete factory drivetrain and built another separate engine, transmission and IRS rear to the specs I wanted. The motor was in the 650-700rwhp range....transmission was Viper spec with beefed up internals. The IRS got a serious makeover to the point the only parts factory were the cage and control arms.
Here is a couple when I was putting it together...
Here is a couple when I was putting it together...