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.

239

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



Lawrenceville, GA

No freeze plugs all early heads have freeze plugs, also G stamped next to the cast EBU

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

must be a replacement.cant get a good look at the sparkplug holes are they still the small plugs.

What about the G stamped into the head?

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

Large

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.

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)