One of the times I had a roller clutch, or sprag, failure was after installing a 33X10.5 tire on the car. I was able to 60 ft. in the teens with 31" tires but wanted the larger tire. The very first trip to the HOUSE OF HOOK, Peidmont Dragway, I ripped the sprag out of the case blowing peices of sprag through the case and into the sheetmetal. The valve body was a TCI made by Tranzact but, was mot a Low Band Apply in 1st gear. Thank God I was smart enough to have and Alluminum Drum. I have seen stock drums in transmissions explode with blankets and still dame chassis and floor pans.

I prefer the alluminum drum not just because of the higher RPM explosion resistance. But, if it were to explode it will be like alluminum rods breaking compared to steel. You may have to replace the tranny but the car will be fine.