Tim:

To add to your post, there were never any "T-Bird Specific" heads.  Any heads found on a Bird could be found somewhere in the passenger and truck lines.  Back in the day, obtaining a pair of '55 T-Bird heads was desired, but the '55 passenger 4 barrel engines used the same heads.  !.78 valves and more compression than 2 barrel heads. 

John - "The Hoosier Hurricane"

Hoosier

Your correct about there never was a specific head manufactured for T Birds but the large casting letters were the only heads installed onto T Bird engines.

These large casting ECZ-G letters style head were installed onto other engines not slated for Thunderbirds.But T Birds always got the big casting style if they were 57 ECZ-G.

Oldmics

Oldmics:

Thanks for that information.  I never knew that.

John

John - "The Hoosier Hurricane"

Oldmics, can you please describe what you mean by large casting letters?  Would the letters be larger than say 113 numbers.  Am curious whether my G heads MAY have come from a T bird.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

46yblock,

If i remember correctly, the small letter ECZ heads  were cast in Dearborn, noted with DIF casting mark and the large letters were cast in Canada noted by CF mark. Regards bill.

  AussieBill            YYYY    Forever Y Block     YYYY

 Down Under, Australia

To reply to the original subject, you'll probably be able to find your heads for much less cost by finding a complete engine in a '57-59 car or truck...

Another point about buying heads that are "done". Without receipts from a reputable machinist, I won't throw anything on an engine. When it comes to machine work, I want to do it once. This means I probably overspend compared to what I really need, but I really like good baselines for reference.

"G" heads really seem relatively common. Sometimes the seller is just really proud of them, even though they could have as likely come from a '57 F-250 or a taxi cab as a 'Bird...

Todd in Central California...about half way between Fresno and Sacramento

1956 Thunderbird - 1960 F-100 - 1961 Starliner - 1961 Imperial

I knew you guys were gonna make me go out and measure those castings.

Bird Head measurements are .440-.450 on the letters.

Dont know the size of the 113 cast.Please be good enough to measure and post it up.

Large casting ECZ-G were cast at Cleveland (hello Cleveland )

Small casting ECZ-G came from Detroit Iron Foundry.

Oldmics

Thanks so much for the info. I think I'm going to try to salvage a pair locally. It's more fun to scavange a little anyway! Thanks again.

Heber City, UT (15 mins outside of Park City- basically it's in the mountains)

55 Effie

The 113 numbers are .40 in. tall.  Checked the heads today.  Thought I had done it before, but apparently looked at the ID on the same head twice.  Disappointed in finding one Bird G head and a C head.  The G has 1.78 intakes.  Both heads otherwise seem very good and have been thoroughly worked over.

Mike, located in the Siskiyou mountains, Southern, OR 292 powered 1946 Ford 1/2 ton, '62 Mercury Meteor, '55 Country Squire (parting out), '64 Falcon, '54 Ford 600 tractor.

Tim on Jan. 15th, 2010 says:

Oh, and the smaller lettering (ecz-g) is a Dearborn casting so they wont be posted, not bad heads but not worth a premium price. IMHO





In my geographic area, (New York state) it seems that I see more large letter 'G' heads than the small letter ones. I like the positioning of the bowl relative to the intake valve on the small letter heads compared to the large letter 'G' heads. From my inspection of small letter and large letter 'G' heads, the cores were different for both the intake and exhaust passageways although the combustion chambers are the same.



Were the small letter Dearborn casting 'G' heads most often used on a particular engine designation, like a '57 272 truck engine. Or, were they used most often by a particular assembly plant?



Thanks for any info. on this topic.



Regards,

NoShortcuts

Syracuse, New York








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