The Mera re-body was technically a dealer installed option, you would buy a new Fiero and the dealer would install the
This cheesy promotional video from gives you a quite tutorial in putting the Mera in 'Merican -- but the short story is that the Fiero's steel superstructure was perfect for bolting up the Fauxrarri parts for "instant status as close as your Pontiac dealer."
The seller describes the car as being less than 2400 miles since conversion, which at first I assumed meant that it was a standard Fiero converted to Mera body, but the conversion is under the hood. The original Pontiac V6 has been replaced with a Northstar V8 from a Cadillac that should be good for 270-300 horsepower depending on donor vehicle. One has to wonder how difficult it will be to change headgaskets now that it is inside the Pontiac engine bay...
Unfortunately the swap uses an automatic transmission, but the dozen or so Ferrari badges inside/out of the car will easily make up for the performance losses from not shifting your own gears.
See another oddball car that looks like a kit-car, smells like a kit-car, sounds like a kit-car...but isn't? firstname.lastname@example.org