331 Head Casting Numbers

[docman]

I'm trying to help a friend build his 331.  He has a set of heads but does not know the year.  I found that there were different valves depending on year and so we can sort out parts for this one but there does not seem to be info on casting numbers and years for anyone else to use.  If you guys can help with years/casting numbers, I will make a table that relates them to the valve sizes and part numbers and let you use it as you see fit.  Fair trade?

[CarFreak]

Sounds like a deal !!

http://www.modifiedcadillac.org/documents/Shop_Manuals_and_Illus_Catalogs/Master%20Parts%20List%20thru%201964/Group%200/tn/Group%200%20-%2013.jpg.html

[CarFreak]

Got valve specs?

http://www.modifiedcadillac.org/documents/Multiple_Years/1940-1954%20Motors/tn/40-54%20Motors-3.jpg.html

http://www.modifiedcadillac.org/documents/Multiple_Years/55-64%20Motors/tn/55-64%20Motors-4.jpg.html

[docman]

Thanks.  I got the Egge Part numbers for replacement valves along with lengths and diameters for all.  I too have the motor manual specs and I agree that we might as well include them since they are important.

As to the head casting numbers, in the info you posted there are GM part numbers and what shows as STENCIL NUMBERS.  If I read this correctly, it is the stencil number that would appear on the head as what we know as casting number - correct?  I just want to be as accurate as possible - knowing that there is such WILDLY inaccurate info out there these days and would prefer not contributing more to it!

[CarFreak]

As to the head casting numbers, in the info you posted there are GM part numbers and what shows as STENCIL NUMBERS.  If I read this correctly, it is the stencil number that would appear on the head as what we know as casting number - correct?  I just want to be as accurate as possible - knowing that there is such WILDLY inaccurate info out there these days and would prefer not contributing more to it!

Those pages are from the 1964 Cadillac Master Parts List.  Should be accurate.   

Not really sure about the Stencil Numbers.  Does someone have heads from the years referenced that could check? 

[CarFreak]

If you want to go back a little farther, here's info circa 1947 Cadillac Master Parts List.