I saw this on CL but it looks like they used a drum for wheel tubs loosing valuable back seat and trunk area.
https://detroit.craigslist.org/okl/cto/d/79-monte-carlo-prostreet/6324805384.html
https://detroit.craigslist.org/okl/cto/d/79-monte-carlo-prostreet/6324805384.html