a mate of mine had his 33 on the weighbridge at his work, came in at about 1420kg with fuel and a bit of gear in it.
as for NA skylines being slow, yes they are. the missus SSS pulsar will keep up with or beat them (depending on mods). an auto commodore or falcon will give them a run for their money and a manual one will beat them, especially with a few mods, and a manual 3.5L magna will shit all over them, especially a vrx version. a lot of P-platers buy skylines thinking they are fast, then they find out that they aren't some uber special import after a car that they overlooked because they thought they were slow beats them in the traffic light GP.