dude - u can check if its an original ST by looking for the oil pressure analogue guage in the dash , the references to 2tb on the compliance plate , and obviously ST badging .. They also have a slightly different grill i believe than the standard ta22 LT ..
Pics would be great if possible - of the car involved
Id be interested in the analogue AMPS/oil pressure guage if your parting her out - and the front and rear ST badging