1977 904 horsepower limits?

Thanks guys. I meant the above in stock form.

I didnt literally mean explode...but failire of the clutches.

I realize its not brand new. And rebuilding it would help longevity. This is a currently operating trans behind a 318.

I had heard many say a gm 700r4 is only good for 400 horse stock, and helped a friend install a stroker 383 on a truck. The trans ran fine before. Lasted about 5 hard pulls and the clutches let go.

Wondered if there was a similar wives tale for a stock 904.