Hey Wayne, good to see a fellow 2GCOG member get into these cars. I once fit an entire rear axle/diff (for my camaro)from drum to drum in my trunk, with the full size spare. These cars are great.
9C1.com has great info. Go there first. http://www.theherd.com/
Be sure to check out the tech articles here, as well as the "91-96 B-body buyers/spotters guide".
The Impala SS and caprice (especially 9C1) are pratically identical cars, so 95% of Impala info refers to caprices as well.