Need LSD!!!
The only difference would be a LSD compared to an open rearend. They use the same gears and axles and bearings.
I pulled one out of a 96 LT1 5 speed and bolted it into my 96 3.4 Bird. Sure is nice to have LSD.
It originally had a 3.42 gear, but I went back to a 3.23 b/c of the 110 mile drive everyday. Well I had first put a 3.73 then started to drive 110 miles each day. Was 20 miles with the 3.73, I could afford fuel once a week, now it's twice a week. 

