I will say there was a reason Hemi and 440 manual shift cars came with Dana 60s.

I will also say that from personal experience the higher efficiency of the Dana makes up for the increased weight and your car will as fast with either the Dana or the 8.75.

As far as the wow factor, I think anyone that looked under you car and saw a Dana would think it was a more serious effort than if they saw a 8.75