WIW: 472 Stroker Crank

Yeah, turning the crank down to 400 main size will weaken it some.

But how much? Relative to what?

Mine has been turned down and has survived over 100 dyno pulls from 620-780 HP with no signs of failure.

Perhaps "weaken" may be relative to the intended usage?

The price is good, if they did a good job.