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another 365 head question

Started by woodillac, September 22, 2017, 11:11:30 AM

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woodillac

Does anyone know the correct casting numbers and which is right and which is left for a '57 365 cylinder head.

J. Gomez

Quote from: woodillac on September 22, 2017, 11:11:30 AM
Does anyone know the correct casting numbers and which is right and which is left for a '57 365 cylinder head.

Doug,

I found this at the HAMB site, believe it is correct but :-\

https://www.jalopyjournal.com/forum/threads/caddy-engine-casting-numbers.397279/

Cast number Year Displacement
1465406 (right) 57 365
1465431 (left) 57 365
1473449 (right) 58-63 390
1468025 (left) 58-63 390

Good luck..!
J. Gomez
CLC #23082

Lexi

#2
My understanding is that the 1465406 heads are for 1956 and are the later replacements for that year, (and possible early '57?). The mystery deepens? I have definitely, 100%, seen these on a vintage 1956 block. Have also seen a pair of heads, (on reasonably good authority) from a '57, with both sides bearing number 1465431 as I recall. I have also heard that some source out even later heads to avoid ALL 1956 castings, especially the early ones, as both have not the best track record for cracking, (with the early castings being the worst), I am told. Clay/Lexi

woodillac

Thanks,

  I am going with '57 heads after all, and the later push rods and lifters.

cadman56

I have seen 56 heads with small holes for the push rods and heads with very large openings for the push rods.  These were off of several 56 365 engines I have torn down, several I rebuilt.  I never had a cracked head from either style.  I didn';t think back then many yrs. ago to document the casting numbers, sorry.
1956 Cadillac Coupe deVille (sold)
1956 Cadillac Convertible (sold)
1956 Cadillac Eldorado Seville (sold)
1967 Cadillac Eldorado (sold)
1968 Cadillac Convertible (Sold)
1991 Cadillac Fleetwood Brougham dElegance
Larry Blanchard CLC #5820