Shoaz said:
I think the Multimatic Firehawk cars were steel, but the car they sent to the One Lap was aluminum. IIRC that was the same year that Gary Morrell took his 89 SHO on the One Lap and he either protested or considered protesting "that beer can" because of it's weight advantage and since it was in the same class that he was (again, IIRC, he could chime in).
The Firehawk SHO's were steel production bodies, pesky production class rules and all that...
Multimatic was a sub-contractor for the AIV project, which was a test bed for making Aluminum panels and evaluating assembly and bonding techniques for Aluminum, which has some fairly unique issues when it comes to fatigue and joining parts together. Honda/Acura has made some real strides in Aluminum unit chassis manufacturing with the NSX and Insight hybrid.
The CEO of Multimatic (Larry Holt) is a certified car nut, and IIRC, he convinced Ford to allow his boys to borrow one of the AIV Sable chassis, SHOise it, and enter it in One Lap, presumably to add some rigor to the AIV chassis evaluation.

The car was driven by Scott Maxwell, one of MM's hired hot shoes, and a very talented road racer. It was entered as a 1994 Mercury Sable, not a SHO.
Eric, I don't recall even considering protesting the AIV Sable/SHO, perhaps some of the other entrants in mid-priced sedan raised a stink? There was some general question about its legality, seeing as how no one else in the class could go purchase one at the dealer. Brock Yates made some sort of proclamation about its legality; I can't for the life of me remember what it was, but it stayed in mid-priced sedan and ran away with the class.
The AIV Sable/SHO placed 15th overall out of about 85 entrants, first in class (mid-priced sedan), with the rest of us plebian SHO's running in the mid-50's placing for overall finish.
It's right at the head of the line in this picture: