TD,
I understand the desire to stay with this axle, and away from furd products. After all it's a great axle. Only problem is the gearing.
What size rear tires are you going to use? What tranny are you going to use? That will determine your speed / engine RPM for the 4.11 gear set. However, unless you get a 0.73 overdrive or really tall tires, you won't get great fuel mileage on the highway.
Have you confirmed that the axle is 4.11 ratio? If it's a 4.56 or 5.13 I suspect you won't be happy with it!
Dogris, now that you mention that... it makes sense. I'll have to re-review my shop book.