tci 904 or built 727

no, there are billet steel or aluminum drums. either is much stronger and can take any rpm the trans will reach. The factory one is sintered metal and will come apart around 8K rpm. Normally it turns at less than engine rpm. There in no horsepower reason to change it. It doesnt fail with any horsepower level. However, factory ones take 3, 4, or 5 clutch frictions. The fewer frictions, the less power it can hold. There are parts available to make any drum hold 4 or 5 clutches, and those will live behind 600, 700, or 800hp with no complaints so long as the frictions are held strongly enough, which is a function of line pressure.