thanks....this is all that I can find so far:
1993.02 : The Skyline GT-R Vspec was added to the Skyline GT-R line-up. The Skyline GT-R Vspec features BBS alloy wheels, 225/50R17 POTENZA RE010 tires, and Brembo calipers and brakes.
The Skyline GT-R and Vspec adopt the pull type clutch, and synchronized of its transmission has been improved.
1994.02 : The Skyline GT-R Vspec 2 was introduced. The Skyline GT-R Vspec 2 adopts 245/45ZR17 POTENZA RE010 tires.