[KingLT1]

I wouldn't even mess with the 2650 at that power level. I would install a ported LT4 supercharger. The car will actually be quicker with the LT4 blower vs a 2650 pullied for 9psi. You don't start getting into the 2650's efficiency range until 14-15psi. You can do a LT4 supercharger just over half of what a 2650 kit costs.

You have to keep in mind that the LT1 is much higher compression. It doesn't need as much boost to make power. So the LT4 supercharger pullied for 7psi with a blend of Ethanol will make an honest 580whp. And it won't have any heat issues at that power...especially ported. It could easily be turned up down the road for 750-800whp and still be capable.