How much HP can a stock 351W crank hold up to, and what company make a good crank for the motor?

 

The stock crank isn't to bad at all. But some say 500-600hp, and I say upgrade it your going anything over 450-500hp.

Probe, Eagle, ohio crank.... The list goes on for companies that make a good crank. Get a Forged Crank!

 

In most case's the block will split before the crank breaks. The cranks in the 351's are pretty strong.