Need block translation

[Jeff Erwin]

I finally got all my plugs replaced, 3 from under the car. While I was under there I found some of the block stamps. Anyone care to decipher these?

I think it's telling me the engine block was cast 11/4/69 but I'm not sure about the number with the -7 at the end. Also what is the little dial below telling me?

 

[BeepBeepRR]

D.N arrow is showing Night shift. Clock shows time. -7 is casting revision or mold. Not exactly sure.

 

[Don67Satellite]

https://www.forbbodiesonly.com/moparforum/threads/440-hp-engine-2536430-7-date-1-15-69.104231/

It's a 1969/70 440.

 

[GTX JOHN]

-7 means 7th time this mold was used.
It is generally used 10 times before discarded unless
a major issue is found in the casting

 

[69 Sleeper Bee]

I believe the -7 is how many times the mold has been repaired / updated since new. 7 is pretty high.

 

[440 PHIXX]

Would most likely be in a 70 MY car. It should say F440 on the pad.

12:00 Midnight.

 

[Dave6T4]

The one arrow shows Night shift. The other arrow points to the time of shift. Note that there are only 8 dots to point at; as in 8 hours in a shift. So, it is not really a clock ( that would have 12 dots ), but shows the casting was done in the last hour of night shift. The -7 would show how many times a core section has been replaced due to out-of-spec dimensions. A new core would be -1, so this one has had 6 replacements.

 

[Jeff Erwin]

So, last hour of night shift, casting repaired/used 7 times out of 10, this thing IS GONNA BLOW!!!


RUUUUNNNNNNN!!

Wait, it runs perfectly. I'm so embarrassed...