Winters can handle a lot of power:

"Winters Performance Products manufactures the best quick change rear ends ever made. Mostly used in circle track racing, quick change rear ends work very well in street applications. In most cases the Championship 10" Quick Change is more rear end than you'll ever need (800+hp). All Winters Quick Change Rears use spiral bevel ring & pinions, the most efficient ring & pinion available. Pinion placement of a spiral bevel ring & pinion uses less power, is more efficient, and runs cooler than hypoid ring & pinions. Hypoid style ring & pinions create more sliding action, increasing heat and power loss."

That said - I'm with Techinspector in that I'd have some type of shielding betwixt the rearend and any of my body parts!

Regards,
Glenn