i need input on this rearend. please help me out

I broke one one time at the track with a stock 360, 72 dart. not a heavy car at all. There not complete junk, but it just depends on how hard ya wanna play, everything has its breaking point, I have seen Dana's break. you just have to mix the right parts. you can't build a bad *** motor and trans and expect them to hold up. But I think they are great under a car with a 170-198-or 225, you don't need a monster rear all the time.