This conversation has continued on off-forum and some snickering has ensued. Apparently another FE Power member within about 20 miles of the "Area 51 Garage"
had one of these "nonexistent" blocks ,and he mentioned to me that theres a third one (all three are early-mid seventies service blocks), within 5 miles of my place.
Im gonna try to find out if I can get a look at it, and hopefully stick a drill bit between the cores. But don't worry, we'll keep the results to ourselves, I don't wanna cause anymore emotional trauma.
Geez, three "non-existant" blocks in a 20 mile radius! Whoda thunk??!! Must be a disturbance in the gravitational field or something!
Don't mind me, carry on with "all 390's are thinwall castings" internet groupthink, some of us are enjoying this...