I noticed this info while re-reading one of the "Y-Block Magazine"s and thought it would be useful info. It was provided by the editor, Bruce Young.

"A very few casting mark ECZ-C heads were milled (somewhere between.030" and .060") by Ford and made a part of a race or the 260 hp packages. ...casting mark ECZ-C were the most common '56 Y Block head. Probably, second (after the ECZ-G head of "57-'59) most numerous Y Block head of all time.

Except for some rare or rumored race heads, ECZ-C heads performance wise were probably the third best Y-block heads. The first two would be the '113 head and the ECZ-G heads, respectively. The ECZ-G heads will normally flow 160-170 cfm. 113 heads because they are more open in the combustion chamber, will flow 165-175 cfm. ECZ-C heads (and pretty much any 55-56 head) will normally flow 150-160 cfm.)

Mike

 

Thanks for the info. Good to know I did good by rebuilding the -113 heads.

 

Mike

Would you be good enough to tell me what specific issue of "Y" Block magazine contains that information?

I am seeking information regarding the M260 and 1956 Thunderbird dual quad setup and recently subscribed to that publication.

I would like to see if Bruce has any still availiable.

Do you have any additional information regarding that setup?

The heads that are listed in the Mercury Bulletin for the M260 setup are EDB-6090-A.

Thanks,Oldmics

 

I will get that info to you in a day or two. The mags are buried again LOL. However, there isnt much more there than what I posted. It was just a response to a letter, which inquired whether or not the man's "C" heads were valuable racing items.

Mike

 

Thanks Mike

I appreciate it.

If you find any additional information regarding the 56 dual quad setups on either the Mercs or the Fords please pass it along.

Its hard stuff to find!

Best regards,Oldmics

 

The issue was May-June 2006, Vol 13, No 3. Nothing much else to the response. The original letter was as follows: "I was recently offered a set of Y-block cylinder heads. The casting mark looks like ECZ-C. The seller says they are special 56 race heads, and wants $1000 for the pair. .... How much better are these heads than the ECZ-G heads on my '57 Ford?"

Mike

 

It was the May-June 2006 issue. However there wasnt anything else there to help you out in terms of information on C or EDB racing heads.

Mike

Edit: Apologies for the double post. Didnt think the first one made it through.