3000GT VR-4s have had AWS steering since day one. All of them.
The Stealth R/T Twin Turbos also had it up until late '95 and '96 models which had it removed.
Any pre-95 Stealth TT and all VR-4s have AWS unless it has been removed by one of the owners.
R/T Twin Turbos have also always had ECS since day one just like the VR-4s. Up until '96 anyway.
The '99 VR-4s have AWS but it is a slightly different setup according to CAPS than the previous years. Don't really know what the difference is though.
*edit*: For the guy looking for a link to a 2WS conversion here ya go.
Removing 4WS from my 92