crank and rods for 340

1qwikScamp said
unless your going all out race with a major power adder i wouldnt use a forged crank because they snap where as a cast crank will flex a little. a cast crank is more than enough for a street & strip car but as for the rods they sound great

well my plans are to keep the solid rollercam(268/272 degrees at 0.050lift) ,fullported J heads and stripdominator intake manifold until i can aford some real cylinderheads and then get a bigger cam and the goal is somewhere around 600horsepower and maybee some more power in a bottle ;) and yes i understand that that is some extreme power in a street smallblock
will a cast crank survive in a 600horsepower smallblock?
asking because i realy want a solid bottomend that wont let mee down in a long time

thanks for the answer on the rods, but im not realy sure about a cast crank