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Cylinder Heads - EBU-G castings

Posted By Cliff Last Year
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Cliff
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Anybody know what these are? in looking through my stock pile I found these, early heads no freeze plugs, stamped with a G after the cast EBU.

http://forums.y-blocksforever.com/uploads/images/9b007bf2-a207-4ebf-842b-835a.jpg

http://forums.y-blocksforever.com/uploads/images/10d97003-8338-4043-b98c-c5af.jpg

http://forums.y-blocksforever.com/uploads/images/8357c8bd-2a93-45b4-85a7-0d41.jpg

http://forums.y-blocksforever.com/uploads/images/ae1d6825-7988-465e-bf13-1726.jpg

http://forums.y-blocksforever.com/uploads/images/e4c98da3-afe6-4eca-acf5-3ae4.jpg
charliemccraney
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239

http://www.ford-y-block.com/cylinderheadchart.htm



Lawrenceville, GA
Cliff
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No freeze plugs all early heads have freeze plugs, also G stamped next to the cast EBU
charliemccraney
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The date code looks like May 3 1956.  I'm sure replacement heads were cast.  Maybe it's simply a replacement.  The ports, valve size and chambers look right for 239.  Sometime toward the middle of '56 production, heads began to be cast without core plugs.


Lawrenceville, GA
darrell
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must be a replacement.cant get a good look at the sparkplug holes are they still the small plugs.
Cliff
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What about the G stamped into the head?
charliemccraney
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Maybe it just indicates a revision, since there are some differences from the original EBU castings.  What size are the spark plug threads?


Lawrenceville, GA
Cliff
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interesting changes no core plugs and went to the later plugs.just when you thing theres nothing left to see in y blocks along comes something new.i dodnt thing ill live lone enough to see it all.
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Cliff (11/24/2018)
What about the G stamped into the head?

Keep in mind that the 239 engine was used as the base V8 engine in the Ford pickups after 1954.  EBU-G heads are not to be confused with ECZ-G heads.  When someone says they have ‘G’ heads, it needs to be clarified which ‘G’ head.



Lorena, Texas (South of Waco)


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