Hi guys,
Been a while since I update this thread...
Meanwhile, there has been some news.
After the last work I reported, the clutch started letting go because of the chip+boost jets.
So I ordered a RPS flywheel + Southbend stage 3 + everything else new inside the clutch:
Nismo Pilot Bushing - Needle Bearing
Nissan OEM Throw Out Bearing
CZP Silicone Clutch Booster Check Valve to Plenum Blue
Nissan OEM Withdrawal Lever Fork Spring
Nissan OEM Withdrawal Lever Fork
SS Clutch Line
CZP Chromoly Clutch Pivot Ball
Nissan OEM Clutch Slave Cylinder
Nissan OEM Rear Main Seal
Nissan OEM Transmission Reverse Light Switch
Nissan OEM Throw Out Bearing Sleeve
Nissan OEM Throw Out Bearing Sleeve Spring
The result was amazing.

The clutch pedal is now light and it doesn't feel a pain in the arse driving in traffic. It also holds the power without a sweat. Sometimes it vibrates slightly when taking off but I guess that is normal due to the segmented flywheel.
Besides that, new bushings were sent (for free! thanks Coz) for the diff. Although they are polyurethane as well, they seem to be much softer (they are black instead of red, does that mean anything?) and the diff was easier to install as well as the driveshaft. However, the diff was still noisy.
Meanwhile, we were trying to find out where the vibrations we could feel at higher speeds came from. We found out that one of the HICAS harms had a lot of slack in it. So a new Nissan OEM 300ZX Rear Outer Ball Joint - Hicas and a Nissan OEM 300ZX Inner Tie Rod - Rear Hicas was ordered.
Along that, Redline 75W90 GL5 to shut up the diff.
So after that vibration improved (although still there) and the diff is still noisy!
So, then we found that the left half-shaft was bent. Found a pair of used ones in the UK. After these installed, the vibration improved a LOT but it is still not smooth. After 110mph it starts shaking (although much less then before). More diagnose needed.
After driving it for a while, I got tired of the slack on the diff...

It is now more noticeable and it does a loud "clanck" when changing gear especially on the lower gears (when releasing the clutch to be more accurate). Found a used diff on the UK and brought it home. It will be installed (or worst case scenario, we'll try to make a good diff out of two bad ones) in the near future so I'll let you know how that went.
On another path of events, I had a boost leak that caused the boost to drop and rise and drop and rise... So I ordered the HKS EVC-S because some people pointed to a boost solenoid issue. Well, the boost leak was found and the car now boosts perfectly but the EBC was already ordered and will now be installed. Along with that, a new pair of slotted Stoptech stock replacement rotors and SS brakes lines from Goodridge.
The exterior was in need of some loving so... New paint job on the front fascia. New rear stock replacement spoiler (in fiberglass). The rear wiper arm will be erased along with the water jet and the radio antenna (replaced by a interior one)... After all this and some dings and scratches are fixed, the paint will be treated to recover some of the shine it once had. After all this, it should be looking much better and with a sleek and clean rear end.
I'll post pics and feedback on the mechanics when it is all done...
Cheers everyone for the help and sound advice you guys keep throwing in!
