my 1957 ranchero has eczG heads,no core plugs. 1.9 intake valves.is a 292 can't find cast #on block,it was .30 over on the 292 bore. has lots of grunt no leakes burns no oil,dura spark 2 sign. this car was from the us.

The first number is the year with the next digit being the month.  The month digit is typically a letter with A being January and M being December.  But I've found numbers in place of letters at that location so there is some inconsistency going on at the foundry.  The remaining digits would indicate the day of the month.  Depending upon the head casting, the date code can be found either on the exhaust side of the heads or in the rocker arm area.

Lorena, Texas (South of Waco)

OlWeldinrig.  See if this info helps with reading Ford intake manifold, engine block, and cylinder head date codes . . .

Click the link below.

http://forums.y-blocksforever.com/FindPost129425.aspx



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a.k.a. Charlie Brown
near Syracuse, New York