Perhaps one from a contemporary Cadillac DeVille or Fleetwood may work, those are about the closest equivalents.
Yes. 91-96 impala, roadmaster, caprice, and fleetwood rear end are all the same and will fit with no modifications.
Much like a 1975 Caprice Classic
None, there is no such thing as a 1998 Chevrolet Caprice Classic
Yes you can.
Google 1999-2000 Chevrolet Caprice Classic.
A Classic Caprice is a more upscale caprice, sort of like a separate trim level. Classics included small upgrades to the regular caprice, but not quite enough to warrant a trim designation.
go ask your mother
... what about it?
The 92 Chevrolet Caprice Classic comes equipped with a 5.0/ 305 c.i.d. engine