2005 Mustang GT with suspected non stock tune

[BulGT]

Hi there from Bulgaria,

I have an 2005 Mustang GT with chassis No 1ZVHT82*******

The bar code on the engine has the following letter/number indications on it:

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I suspect that there might be some kind of tune in it as I got it second hand.

How do I find out if the tune is stock or after-market?

I have read it with a handheld flash from another mustang and I think I saw some kind of version of the software, it was about 8-10 digits and letters.

Is it possible to see the version or "name" of the software and if it is what is it called and in which menu of an handheld flash or scanner it is contained.

I need to know that before purchase, because of the issues I read about here in this forum. - that the trinity will refuse to upload a tune if there is already another one in the car.

Best Regards and thank you in advance for your replies!