1966 Gts?

Does the 1966 Dart GTS exist? I have seen an 1966 mopar memo on modifing darts and barracudas for road racing that mentions them as well as a recent mag. article. The memo stated the GTS as having 273, 4 speed ,8 3/4,ftr. disk, hd susp, sway bar,quick steer and goodyear bluestripe tires. My 66 dart gt has all the above. I have the broadcast sheet . My "little white book" dosen't list them either. Any help befor I begin resto. would be great! thanks!