US-spec GTS cars have a "GT" in the serial number, but Euro-GTS cars do not, so there is no way to tell. The Euro-GTS option had a bunch of desireable mechanical upgrades - 330hp, bigger brakes, improved suspension, bigger rims and tires, etc. The American GTS cars got none of these improvements, and it was only a cosmetic package.
After 30 years, parts have no doubt been replaced and modified so it is tough to tell if it is a real GTS or not.
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Charlie McCall
1972 DeTomaso Pantera #3847 (for sale)
1985 DeTomaso Pantera GT5-S #9375
"Raising Pantera Awareness across Europe"
http://briefcase.yahoo.com/gt5s_1985
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