I'd say the OP is fine with what he has, if it breaks it will be the teeth on the ring gear. If he was hittin' it hard with a loose converter on a big tire then he'd need a Dana.

Just out of curosity to all the guys that claim the 741 is the weakest. How many pinion gears have you seen broken, not teeth but the actual shaft? All 8 3/4s are the same size (in their respective spline count) on the pinion where it is machined for the splines. I've never seen one break there, 741, 742 or a 489. Not saying it has never or won't happen, but all I've seen have broke the teeth on the ring gear for one reason or another.