'"I never broke one "

I had a mild bracket 455. Bought a TH350 out of an 11sec sbc Nova. It broke the sprag outer race first time out.

So, I bought a TCI hardened race. It also broke 1st time out. So, I had a stock race put back in it and sold it to another sbc guy.

But, nowadays they have the 36 element sprag/drum/race units that will stand up to lots of torque, without braking.

But I've known some guys that seem to lead a charmed life. They can run weak parts, high rpm, high compression on pump gas, and all sorts of stuff that normal guys can't get by with.