An rb25 will last a long time in standard form. Plenty of turbo r33 skylines with well over 250000kms on them in Australia.
Not sure on rb24, but I know rb25 and rb20 hanger parts will all swap over (A/C, Alternator, p/s), as will the engine mounts and gearbox.
For filter, use one off a z32 if they're readily available. If you need to know more about Rb parts, maybe try
www.sau.com.au
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