Alright so it's been a while since I posted much progress. My short block is at the machine shop and hopefully I'll get a call to learn what the damage will be to recondition it. In the meantime, I've been reassembling the head.
Yep, got me a brand new OEM camshaft. Why a new one? Well you saw how it looked even after being cleaned. All those pits on the lobes. Here it is installed with the old one:
(Yes, that's a tribble.)
And now the new rocker arms are all installed, valve lash adjusted and retainer springs on.
Warning: The book
How to Rebuild your Nissan & Datsun OHC Engine has an error in the photo on page 111.
The text on page 109 is correct, and here it is from the Factory Service Manual:
Once I get my block back, I can finally put this puppy back on.