I'm installing an LS364/450HP GM performance engine in my 06 Escalade and will also be replacing the fuel pump. I've been told I need a fuel pump that can deliver at least 255 Liters per minute fuel volume. I cannot find the LPM spec for the OE MU1639 fuel pump to determine I can replace with the same model or need to switch to a higher LPM pump. Any suggestions for a higher LPM pump if I have to change? I prefer to use GM parts if possible and want something that is a complete, drop-in assembly. Thanks.