Wow it's considered a luxury car? Looks like the civilian version is only available with a V6. The Caprice here will have the 6.0 liter V8...
The Stateman/Caprice sold here has a choice of the 3.6L SIDI V6 6-speed Automatic or 6.0L Gen 4 V8 6-speed Automatic. The V8 also has something similar to SIDI dropping down to 4 cyl. We run the same V8 in our SS Commodores. =]