GTS or GSS

I'm not sure about M code. But I always thought in 1968 you could buy a 440 Dart that went to Hurst for Mods and then came with the nose in primer. It also had a disclaimer on the inside of the glove box stating Race only .This I only knew from hearsay back in the day. May have had fender well headers as well? Then in mid 69 Stormin Norman drove his (Originally 383) 440 68 Dart Street version over to show Lee and in Mid 69 the 440 Dart street version was born.