[racer]

As one mentioned, color matched wheels were available as a factory option. They were also a common "dealer" option. That said, Porsche has always been willing to meet unusual customer demands through their "special wishes" department. Paint to sample? Special interiors? Backroom engine mods (ok, this was mostly European markets due to US Emissions standards) but almost anything was possible.

While we can't confirm if they are original to the car without a buildsheet/option sticker sheet, at minimum, pull the wheels and check for the date stamp on the backside. If a year other than 84 or maybe even 83 as Porsche would have used up any leftovers, and depending on your build date, these could be original to the car.

15" - 7" front and 8" rear were standard (Fuchs)
16" - 6" front and 7" rear were available (Fuchs)
16" - 6/8 or 7/8 could be purchased from dealer or ordered with the car (Fuchs, or aftermarket such as BBS)

Can Can red interior was also factory availlable.
Spoilers, when ordered from the factory, came matched with front and rear.
In the 1980s, radio was likely part of "US specifications" and could be deleted or the dealer might upgrade for the buyer.

Many dealers in the 1980's spec;d their orders to what was selling. Sunroof, aftermarket alarm, upgraded radios, gold BBS wheels, Spoilers. Occasionally bold color combos.