crank and rods for 340

moper said

If you truely want to reach, and buy the parts to reach 600hp, you will need an MP block and someone's forged crank. At least if you want it to live for any great length of time as a street car. I dont believe that cam can go anywhere near 600hp either. Closer to 550 with decent heads on a 416.

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ok, will start looking at a new block to then, i also think this cam is to small to get 600 hp just thought i could keep it until i got some heads that could make use for a bigger cam the J heads i run now are the limiting factor already at 345cui i gues
i realy aprecieate all the info i can get on this since i think a 600hp 416 and maybe some nitrous is what it takes to make a streetduster tip into the 9´s
btw whats the limit for a fourbolt billet maincapd halfilled 340 factory block if the sonicsheck is ok?
thanks alot:)