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ok so once a conversion is done, Engine is fitted, brakes, suspension all made to match the power

What are other things that an be done, Or should be done

How much do Parts like drive shafts ect differ between models? Would it be worth getting a second hand GTR Front drive chain.

Also Who would do a detail of the car chassis and under body, Like an acid wash and coat of sealer under the body, A examine for rust spots, Changing Chassis bolts, After all all these bits and peices are 15 years old, Surely there would be snapped studs that are still holding the car together.

Do people worry about this sort of thing? Im not sure were to begin other then getting under a hoist and looking over it all.

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Its generally good practice to fix all problems with your car, this may be a present problem, or a developing issue. So if you or your mechanic warrant it as an issue that could do damage/harm down the track or the part is worn or unservicable, then fix it. As for a detail underbody, get an air degreasing gun and a pressure washer, make sure you relubricate anything that may need it after you are done, and dont go too nuts with the pressure washer, may cause more harm than good. I personally give the car a quick degrease underneath whenever i service it or whenever i am chasing an oil leak. Good practice to get into.

Cheers, Allan

Changing Chassis bolts, After all all these bits and peices are 15 years old, Surely there would be snapped studs that are still holding the car together.

Do people worry about this sort of thing? Im not sure were to begin other then getting under a hoist and looking over it all.

Unless they've been abused you shouldnt have any snapped studs, they're very durable. my skylines 25 years old now and has had every drivetrain part removed and reinstalled atleast a dozen times. the original gbox mount studs, engine mount studs and subframe mounts etc are all still original and working perfectly

Don't fix what ain't broke.

+2. half the time "fixing" what isnt broke for "peace of mind" makes it less reliable.

90% of the stock parts (from engines to boxes to diffs to axles etc) can handle a lot more abuse than most people would ever give them, until it becomes a problem/restriction just leave it as is.

I tend to agree, their are so many wearable items to constantly go through from bushes and rubber to seals and degradable items that the non serviceable bits should be on the bottom of the list unless broken. When was the last time EVERY bush and mount was replaced, if anything staying on top of these even pedantically will stop any damage to the static items

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