I have a 57 312 the only numbers I can find on the heads are 6090 under the valve cover I no thats all ford heads. The left head is 60 A right head is C 69 ???

There’s some pictures of where to look, and the casting numbers here

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



miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

Thanks that is where i found  them there are no other numbers 6090 under valve cover 60 A and C69 between exhaust portes. no date codes ?
  

http://www.ford-y-block.com/ltcastnub.jpg

See if this link takes you to the top right of the 3 pictures. Try there, it’s tough to see on the engine or in the car, even worse if not clean.



Don’t get hung up looking for “312” numbers, even if you’ve checked the main caps. Lots of parts got substituted over the years. My first 312 had mismatched heads.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ

Heads are disassembled and sandblasted  these are the only numbers makes no sense but it must be a Henery thing.

have you looked under the front water port infront of the intake side of heads?


  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

yes

The numbers are in one of those two spots.  50 years of baked on grim may not come off with a sandblaster.  Get a pick or sacrificial screwdriver and make sure it is absolutely clean.  The only other option is that someone ground the numbers off but there would be clear evidence of that.


Lawrenceville, GA

Are these cylinder heads still on an engine? Do the heads have freeze plugs in their ends?  The head casting numbers on some of the earlier castings will be on the exhaust side of the heads which makes the casting numbers somewhat invisible until the exhaust manifolds are removed.  As shown in the supplied links, many of the later model heads have the casting numbers either under the valve cover or under the water ports where the intake bolts on.  I have come across instances where the casting numbers under the water ports have been ground off smooth by persons unknown.

Lorena, Texas (South of Waco)

My 57 G heads have the G on the mating surface and under the water port. Not sure if they all had it.