Could use a little guidance on my build. Small block stuff

I would look at a R3 block. They are around 3k. Then I would look to call San Diego Forced induction and they might be able to help with the turbo or even Steve Morris engines, they make kits or prochargers for the power you want. 600whp is a round 700-750 crank. It would be easier to go P1 or D1 procharger. Also I EZ EFI is not for forced induction. Either go CSU Carb or XFI or even Big3 fuel injection.