Guys,
Sorry its taken me 6 months to respond. I've been away.
However here are some pics of my Rb25 neo in a 4 door 1984 MR30.
Some things i should point out.
Engine Mounts - I got mine off a VL commodore. One is longer than the other. Engine seems to sit upright though.
Radiator - The RB series motors have both water inlet and outlet on the same side. Requires a custom hose, or custom radiator.
Electrics - Some things will not match up. Rev meter for one, and temp sensor is a little off range. (when your guage hits C it means you need to pull over)
Knock at low RPM - Still have not figured this out out. Going to put it up on ramps and check out all the angles this week.
Power Steering - I had a chat with a mechanic during the week about the power steering because I still have the power steering pump off the R34 front cut, he seems to think that if you make up the pipes to the MR30 power steering assy, and hook up the resevoir, it will work. Its just a matter of adjusting the screw on the back of the pump to suit the MR30. if its to light turn the screw out, vice versa (it has to be better than nothing)
There are a few other little things as well like relay wiring for the radiator fan, and why the warning lights on my dash still come on. But its just a matter of spending some time with the wiring diagram.
If you guys want any more pics just let me know, I promise it wont take six months this time