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Author Topic: What do these numbers mean?  (Read 1503 times)
sixt9x33rs
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« on: August 08, 2010, 09:35:35 PM »

I saw these numbers on the back of a small block with the bellhousing removed. They were above the crank:

678636 386371 H35
371386

The H35 is not a casting date. The casting date was in the normal location.

Thanks
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'69 RS Z/28 Olympic Gold, 711
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69 X77 Z/28 69 711 Original Paint Unrestored
'69 X66 Convertible Cortez Silver 712 black top Endura, auto, bumper guards, am/fm rear speaker 44k miles
JohnZ
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« Reply #1 on: August 09, 2010, 11:42:52 AM »

Those are foundry identifiers for the various patterns and cores used to form the sand mold for the block; they're unrelated to the final assembled configuration of the engine.
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sixt9x33rs
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« Reply #2 on: August 11, 2010, 06:29:09 AM »

Thanks John.

Were you in Charlotte for the National Convention?
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'69 RS Z/28 Olympic Gold, 711
Flat hood no spoiler, black top, endura, 4:10
POP 39,000
69 X77 Z/28 69 711 Original Paint Unrestored
'69 X66 Convertible Cortez Silver 712 black top Endura, auto, bumper guards, am/fm rear speaker 44k miles
JohnZ
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« Reply #3 on: August 11, 2010, 09:07:13 AM »

Thanks John.

Were you in Charlotte for the National Convention?

Yes, I was - great convention! My Michigan Chapter is hosting the National next July.
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'69 Z/28
Fathom Green
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