Well can you confirm if the TRX and TR package are the same or different?
Everywhere I read about it, it says "TRX" not TR. Maybe we aren't talking about the same thing?
I got that information out of: The Official Ford Mustang 5.0: Technical Reference & Performance Handbook, 1979-1993.
I'll check it out later and see if I'm mistaken.
But I remember reading it in the book.

What is Ford ESP?
So you're saying that after the CHP ordered the SSP car, they modified the suspension themselves?

What I was saying was, the TRX package was the predecessor of the GT package. The GT package was a standard list of items, all GTs were the same. The SSP (from what I remember reading) was a special order car. I'm not saying the SSP had special options, I'm saying that it was ordered special with all the options available. Which may not included the same options as a mustang sitting at a Ford dealership at the time.

I'd like to look up what I'm referring to, no point on going off of my memory. I can quote out of the book, and we can deceiver its meaning.

Well I'm thinking it is stock. That's why I'm posing this question.
This is not eBay, no one makes parts for the 79-86 range.
This was put on by A) Ford, or B) CHP in 1983/4 when they purchased the SSP.
This car seems to be super original, nothing has been changed.
Things that were damaged have been replaced, IE: Dash top, Seats. That could have been changed by the dept, considering every mustang has the dash top cracked by the sun, and the seats were known to wear out.

There's no reason for me to think some kid installed the rear coilover thing.
If you go search the internet, you wont find any coilover kit that looks like this. IE: one off, or maybe the last year of the TRX package they had a coilover option.

Since we have some conflicting information here, I'll do my homework again and get back to you.

Thanks for taking time to respond.

upr also makes them and it doesnt have to be between 79-86 that suspension setup lasted till 2004 thus some parts on the suspension ie coil overs can be used on other years too my upper and lower bbk control arms can go on a 79-98 my springs can be used on any 79-04 mustang v8 hardtop shocks and sruts are a little different you can get ones that work on 84-04 or some that work 79-04

With slight modification.

Book quotes
 

Just some stuff I was looking at reguarding this.

Thing is, CHP would never tamper with the mechanical/suspension side of the cars. They would not put disk brakes, or upgrade suspension, or swap motors, or ...
They modify the car, they are open to lawsuits of something happened. That's one of the reasons they don't put strobes in their cars, it's against the vehicle code and tampers with DOT safety standards.

Many parts (OEM and aftermarket) have been discontinued since these cars were new. The coilovers on your car now are most likely aftermarket performance parts that are no longer available.

the only thing chp may do was subframe connectors on some cars but not all cars had it from chp

I've seen a few articles where the department did their own upgrades.
They were having problems keeping up with cars equipped with aftermarket parts. So they added some performance parts, and safety equipment. They featured it in some Mustang magazines.

I'm sure you are most likely right, aftermarket.
But it seems like a possibility that it could have been used in service like this.

The subframe connectors look old, and were welded on (similar to the wields for the c pillar and rear fender antenna from decommission).

I did a car fax on the car, and it had no DMV record until 1994.

From what I remember about the cars history from the man I bought it from.
The car was owned by a young dumb kid, and he didn’t know how to work on it. So he took it to a local automotive shop, they did repairs to the car. The bill was never pair, and the car was sold to another mechanic as a lean sale. It sat for a while and then I bought it in early 2011.

The subframe connector, rear coil over and 4 barrel eddlebrock carb is the only thing changed on the car when I got it.

I was hoping someone else might of had someone setup like this, but I guess not.

TR and TRX is the same thing. Mercury called it "TR" after '81(?), that's where I got it from.

What you quoted above about the TRX and Handling/GT suspension is exactly what I said. There's nothing in there about being able to pick and choose parts within those packages. And if you ordered a V8 or a turbo 2.3L, the Handling/GT suspension was not optional. It was mandatory. The TRX suspension was optional on everything (except the models I listed on page 1), even the V8s and turbo 2.3, but the TRX parts replaced the Handling/GT suspension parts in those cases.

Nothing in the list of SSP-only parts shows anything about the suspension. SSP got the standard Handling/GT suspension. No changes. No extra duty control arms or bushings. No coil-over shocks. No larger (that Handling/GT) stabilizer bars. All standard stuff that every other V8 got.

Where did this information come from?