The best source for (mostly) Accurate Information, still are the original Service manuals. At least if you don’t have access to the factory documentation. So i got a bunch of documents lately from various sources:
1) The heater manual. Actually it’s a free download from the classiczcars.com website, which i just printed for easier access in the workshop.
This one covers especially the S30 series Heater system:
2) The Japanese Steering Manual. It covers an array of Nissan Steering racks up to 1978, including the S30 of course, and i’ve never seen this one before, so i had to get it before it starts to hit prices like the other early Z-related original documentation. It’s in near-mint shape too!
3) From Belgium i got a set of 260Z Manuals including the S30 Body and chassis Supplement 1. Which is more or less an add-on to the earlier version and includes the latest updates. I bought them mainly because they were cheap and to have some details on the later S30 Chassis versions.
4) Also from belgium i got this german Datsun Electronic fault-finding manual which is a bit funky and clearly different from the other manuals. It’s a bit later too, so it includes the S130 and not the S30, but has a lot of general information, wiring diagram fold-outs and is just a cool little add-on to the collection.
I still have a few manuals missing in my collection, and the picture below does not show all the Z-related factory documentation i have. But here’s just a little glimpse at some documents in the shelve. What is really missing for me is some sort of factory / supplier made Sumitomo MK63 brakes documentation, which i haven’t seen yet. And then the Printed L-drive Parts manual which i have in digital version and as Microfiches, but not as the most detailed printed version. I still have to read through the new manuals when i find a few quiet minutes.