I started and reboxed mine. There is no seperate firewall, its the front part of the interior tub. Does'nt fit even closely to the body. If anyone else had that issue I'd sure like to see your solution.
Had a 85' with HO option same color. Bought new and wife drove it to work every day. I talked her into selling it (to buy a Corvette). She cried when the new owner drove off with it.