Here are a couple more pics with the back story.
I bought the car from the original owner's brother who bought it new from Merollis Chevrolet, just a few miles from the house where it had been stored since the 1990s. It's a neat car that seems to have one repaint in Shadow Gray, an all-original black interior, and its original M21 and 4.10 COO code 12-bolt rear. It does have a CE block that was installed in '71, and the smog system was removed and the tubes plugged, but otherwise it seems pretty original. It came with the POP but no other docs.
The body is really clean except for the passenger rear quarter, which was hit and poorly repaired, and hit again, along with a pretty sizeable crease in the passenger door. I'm going to hang a quarter on it and see if the skin can be straightened.
This is my first second-gen - I'm pretty stoked. I love how the OO ordered this car.