Just remember when looking at a 300zx is 90% of them have seeious electrical demons and most of the water hoses are perished and require replacing. They are also very light in the rear and have trouble with traction at standard power levels.
Also they are harder to work on then a gtst (won't say skyline cause the Gtr is a pain) and good ones may be harder to find
Quit a lot of the nsw members use jem, they built their reputation on quality work and tuning ability
(I'm not a jem customer personally but do respect their work)
Does anyone know anywhere that does engine crack testing in sydney or even just outside of sydney (woollongong/central coast)
Asking as I need a cast iron block tested