The most advanced and glorious steam locomotives were developed and put into service in the last 10 years of the steam era, before they were replaced by diesel electrics.
General Motors should do the same. It should revive the Chevelle as a muscle car. Give it a 6.2 liter V8, an 8 speed auto or a 6 speed manual, and active suspension.
I bet a well performing "non luxury" high performance sedan of that size would sell to those enthusiasts looking for one last high performance ICE along the lines of the Pontiac GTO, the Plymouth Roadrunner, and, of course, the high performance Chevelles of 55 years ago.