I agree that none of the parts will make it. The block is usually good for 600HP for a start. A stroker crank will make things easier, A performer intake will not do it, 750CFM is not a big enough carb and Performer heads are not the right choice if you are going after that much HP.
Your stock block and forged crank could be the basis for a decent 500HP build with Performer heads and a better intake than the stock based Performer.

Sheldon