Tell me how strong was or is you 7 1/4 rear.

Don't try to do any brake stand burnouts or you'll hear a sudden "SNAP"!

Don't make a 90* turn and pour the power to it in the turn. Yep "SNAP"!

Having given these warnings, the one I just pulled out of my 66 has been in there behind a hot 360 / 727 combo for about 15 or more years now. And it's still good to go, even with the 2.94 (?) gears. I drove that sucker pretty hard, but always made sure I was level and straight before putting the go pedal to the metal. :)