Made some progress......
I went out today and installed the replacement 8.8 with 3.73's and I also installed the CHE rear control arms.I have yet to drive the car,and pics will be posted here later.As soon as I put the old diff. in the garage and shut the door,it started a light rain.I got it done just in the nick of time.I'll test drive the Sport after while and also post how it feels.I've had 3.55's for a long time,and I've been wondering if 3.73's will be that much of a difference over them.One way to find out.I also have been wondering the difference the car will feel with the tubular control arms over factory.