Impala SS production was slated to keep running, and is even in a few '97 model year brochures, with an additional color(silver), but was never produced . It was discontinued because GM changed the plant that they were built at to build Tahoe's and Suburbans because the profit margin was higher, dispite the success of the
b-body platform.
Yes, they do sell extended rear lower control arms to center the wheel in the opening.
They all came with the 4L60e. T56 swaps are becoming pretty common, and are totally awesome.
The ImpalaSS forum is a great source for info, I'm a member over there as well...
'96 is the year to go for. Only year for a floor shifter. It is also the only year that they offered the analog dash, better than the stupid digital display that fails. Mine did in my '96
Caprice and I replaced it with a cluster from a Z28, another swap that's becoming common. There's a gentleman that converts the wiring so It's plug and play.
By '96, they had added a weep hole/vent to the opti-spark that would prevent moisture from becoming trapped inside the unit, causing them to fail. Earlier ones are very sensitive, and mine has literally been soaked with coolant (when my water pump went out) and still never had a problem.
'96 was also the first year for OBDII, and its pretty sensitive compared to the OBDI, so check engine lights are common. I've seen a number of people switch from OBDII back to OBDI. My check engine light has been on since 15K, and the stealership was either too lazy or not skilled enough to get it solved for my grama(who bought it new) and I've driven it from 30K to 119K with it still on and it runs fine, but the light is annoying.
I love my
Caprice, and though I've considered selling it a number of times to help fund my g-body projects, I just can't bring myself to do it...