Advantages of LSX block for twin turbo application?

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I'm in the planning stage for a twin turbo 8/900 hp 70 Camaro project.

Being new to forced induction, I'm curious about folk's thoughts and suggestions on just how strong I need to build the bottom end for this HP set-up.

It has been suggested that an LSX block with additional head studs, and an appropriate set of heads, would be a worthwhile investment.

Can someone comment on their experience here and suggest some parts combos that will get me where I want to go without overkil or breaking the bank?

Thanks,

Brad