I want a solid motor without any worries of it crappin' on me so if I need a 4340 crank then please let me know, otherwise I could use the money elsewhere. I'm going to use the NOS Sportsman Fogger kit on a 383 that will have anywhere between 450-500 horses.

Thanks

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The '82Z
Hugger Orange
383 4 bolt main
3000 lbs
Bad cornering
NOS Sportsman Fogged
10 bolt braker

Coming to a street near you in the spring...
The car's website

 

The 4340 crank would not be a bad idea but you don't "need it" you can use that much juice on a cast crank but in time the crank will suffer. A fogger will be a little easier on the crank/bottom end because it does not hit as hard as a plate system. The 4 bolt mains, steel crank, and after market rods you never realy "need" they are jsut insurence that the motor will last a little longer.

 

One thing I know you will need is a rev limiter.Weather you hook or not,rpm will shoot to the moon fgaster than you could lift your foor of the gas with 300 shot.I think if you keep the rpms reasonable,a good Gm forged crank would definatly do the job,4340 is overkill for the street if that what you are running.