There are a bunch of oddities on the Saleens that are spot signs of the real deal.
The obvious is decals, badges, and real Saleen wheels. But the early cars have some odds and ends not common.
84-86
LX interior, but with GT seats. This is true in MOST cases, but some are LX seats, and some have GT interiors.
No engine bay plaques on these.
No strut tower bars.
86 had an oddball 3rd brakelight not built into the wing. 87+ were built in.
85/86 had a couple of different bodykits which are signature Saleen, but no bodykit cars do exist.
All Fox Saleens have onionhead shocktower mounts. These came from 84+ SVO Mustangs, and are a sure bet in Saleens, unless a custom CC plate is/was installed.
MOMO steering wheels, mostly 3 spoke, but early 86 and 85s may have a 4 spoke. If owner wanted cruise, factory wheels were used.
Kenwood 2 knob stereos were optional, not all early Saleens got them.
On the map light there is a barrel plug designed for the Escort radar detector which came with the Saleens
87-93
They got cooler interiors than the older cars.
Flo-Fit custom seats matched with Saleen interiors, usualy grey, could be leather on the newer cars.
Recaros, IIRC 90-93, also could be leather, grey or black interiors.
Had SVO 4 wheel disk brakes, but stock GT front control arms. With the wider rear axle they had different offset wheels.16x7 fronts and 16x8 rears.
A lot of different wheels choices from basketweaves to 5 spoke. Speedline 5 lug are the most desirable. Cost of these is thru the roof, if you can find them.
The MOMO went away in 91 with mandated airbags IIRC.
A few cars were built S/C'd from Saleen, but special order only.
Cool history, I know I don't know all of it. Learn something new all the time. I'd like to know some more about SN Saleens.