You sure your car is a non turbo..? Don't be mistaken but it is a GTS, right...
Yeah yeah just making fun, jokes!
In relation to the thread topic, scotty180sx, it would be a lot easier if your g/f just bought a Nissan Silvia Q's.
They are quite the similar car.
If she gets a 1988 - 1989 model, the Q's will have a 1.8 L DOHC-I4 (CA18DE)
From the mid 1990's - 1991 models, they were equiped with a 2.0 L DOHC-I4 (SR20DE)