Best bet, call an engine builder who sells/builds forced induction motors and ask their opinion. Then buy a part or two from them for their time!

 

My plans keep changing so my signature may not be accurate. The engine I am building has -14 cc diamonds with 243's netting me roughly stock LQ4 compression with the LS9 gasket. The goal of the engine is upwards of 1000 hp...... That said I may use my KB kit I have on the stock LQ4 in the 2500 and use this built 370 in something lighter..... like a half ton I have a line on for when I get home. If machine shops didn't take so bloody long to do anything I wouldn't change my mind so many times, lol.

 

The cranks are about .400 longer. You can not run a good SFI approved flexplate (from what I have heard) with a stock converter. The flexplate is thicker, and you will not have the room. If you run that crank and upgrade to the good flexplate, just tell your converter manufacturer, and they will get you the right converter.