I recently bought a 71 Duster and im trying to figure out a few codes on my fender tag and was wondering if somebody could help?. What numbers i cant find are...GT2 which appears twice and TX9...921...VL29...C1E and then the #s...136042 and 108604. If anyone knows what these mean please let me know . One more thing i dont understand is the code U which says Built to specifications for USA order. Does this mean my car was built in Canada? or the USA? THANKS