Well why I'm at work thought I might as well update this. Since this time last year I have put another engine in (now my 3rd) with plans to build the second engine. Current engine has a few things done and a few nismo goodies. New turbo has been fitted and is off to get a tune soon. I went with a tdo5 18g, most people use them on sr's but the difference will be minimal.
Im now running nistune aswell and the car has under a full rewire, gearbox has been rebuild and a lightened flywheel as well as a 6 puc ceramic button clutch.
the car still runs steelies but has 15x10s all round now and has had an few incidents with tyres stacks. One of which was at about 120kph and pushed the rear half of my car in.
how I fixed it (halfway through the process)