[Alex Denysenko]

GT-N = GT Norm.
First one was actually a 66 GT just to show the engineers it could be done.

Early 67 Dart GT with 273 converted to 383 in house at the dealership using custom fenderwell headers and some other aftermarket parts. I'll have to find out what else.
This is before the factory would do them. Most of you Mopar guys know that the 67 GTS was a late model year introduction. January or February I think.
Norm tells the story often of how the factory engineers told them that you could not fit a B motor into a A body car without major mods. The dealership mechanics did it with existing parts and then Norm and his brother drove the car to Hamtramk to show the factory people. The GTS was born shortly thereafter.
GT-N-1 was a 440 car. It was going to be a street Hemi but the factory nixed it for obvious reasons.