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When I bought my 92', it had many issues. One of which was one of the rear disk rotors was ground down, for whatever reason, halfway through the rotor material on one side. I didn't think much of it until the calipers seized. I rebuilt them using brake fluid as the lubricant to reassemble them. That's what I was taught years ago, and I have been doing it ever since. Every 2 years or so, for the past 10 years, I have been tearing apart the rear calipers, unseizing the piston, cleaning the rust out and reassembling using the same process of using brake fluid to lubricate the assembly process.... When the calipers were seizing, the symptoms were pretty obvious sometimes. A smoking rotor is one of them.... One of the things that threw me off a couple of times that I didn't really put 2 and 2 together on for years, was that the ABS light would occasionally light up and stay lit when the calipers were starting to seize, and would go away for a while after the rebuild. I was making an assumption that it's old electronics and mechanical gizmos that are starting to fail. The last time I tore apart the calipers, I reassembled them around the dust boot with a one-time-use packet of synthetic brake caliper grease as recommended by one of my co-workers. I'm not entirely positive that is it's the intended use for it, but it's what I used. Ever since then, the calipers have been working flawlessly and the ABS light no longer lights past the initial POST (Power on Self Test). What I think was happening is that the Mechanical gizmo on the frame was throwing a fault when it couldn't push fluid. So... With this observation, maybe that ABS light you have on your dash being lit isn't a symptom of your module or gizmo starting to fail. Maybe it's a symptom to something else.... in my case at least. Just thought I would share one of my experiences that I learned over more than a hot minute....

Sooo... we have planned obsolescence from the car manufacturer's and forced obsolescence from the govt in many places. Fortunately we don't have much salt put down here in western Washington. This is the place is where old vehicles go to survive the salt and corrosion... most of the time...

The VG30 was twin-turboed in the 300ZX - not sure how well that translates over to the vg33 but I suspect it's been done. You may also want to see if you can find a supercharged VG33 - these were available as an option on Frontiers and Xterras in the early 2000s, called the "VG33ER" motor. Good work on all this! About to do a timing belt and water pump + front seals on my VG30 next weekend.

All this work was done in 6 months,from fully fixing rear and front main seal oil leak (took 1 day as its the first time working on a vg) and well all this was done with hand tools, its like 50 things or more I've done mostly mechanical