I have a customer that installed a LS3-525hp crate (aka LS376-525) (GM PN 19369338) (link http://www.chevrolet.com/performance...ines/ls376-525) into a C5 Corvette. The plan is to use the factory C5 ECU to run it. He has a lingenfelter adapter to allow the use of the 58X wheel. I know that this is a long shot, but does anyone have a base tune for such a beast?