As abodyjoe and others have mentioned, you must be 100% honest with any converter supplier, or sure as he.. you'll get the wrong one. You mention that your engine makes 472HP and 529ftlbs of torque. From this, I guess it's safe to assume the engine has been on a dyno, and if so, you'll have the dyno sheet. If that's some PC DYNO readout, it's not worth the paper it's written on. Make sure that your converter supplier gets a copy of it. Don't let price be your final guide as to where you buy your converter. Get the RIGHT converter for YOUR application and deal with a company that has a good reputation and a warranty policy. Also ask about re-stalling the converter if and when you change the rear axle ratio. When you change the axle ratio, the stall will be affected. Some companies will charge to re-stall a converter, some won't if done within a specific length of time. The company I worked for in the past had a 1 year/1 time only, re-stall policy at no charge to the original owner.