Register now to get rid of these ads!

1956 Corvette heads..anygood?

Discussion in 'The Hokey Ass Message Board' started by dmarv, Oct 21, 2008.

  1. dmarv
    Joined: Oct 10, 2005
    Posts: 943

    dmarv
    Alliance Vendor
    from Exeter, CA

    I've got a set of 1956 Corvette heads with casting number 3731762. I was wanting to use them on a SBC. I need a head that has the early style valve cover bolt pattern for a period correct application. Are these heads better than any others? Value of the heads?
     
  2. oj
    Joined: Jul 27, 2008
    Posts: 3,788

    oj
    Member

    Don't know much about the heads but i've got a set of the right finned alum valve covers for them, give me a shout if you need em. oj
     
  3. 49ratfink
    Joined: Feb 8, 2004
    Posts: 14,518

    49ratfink
    Member
    from California

    that's a 2 4bbl head. sell it to a corvette weenie.
     
  4. HEATHEN
    Joined: Nov 22, 2005
    Posts: 7,585

    HEATHEN
    Member
    from SIDNEY, NY

    For what you could get for those heads from someone that's redoing a '56 'vette, you could buy a pair of rebuilt '57 power pack heads (bigger ports than '56, but still staggered valve cover bolt pattern) and have change left over.
     
    Register now to get rid of these ads!

  5. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 19,587

    Bruce Lancaster
    Member

    Yes...I remember a query in HRM's letter column long ago about reworking some of these. The reply, probably Racer Brown or Don Francisco, was advice to keep the hardware and buy a set of '57 castings. Editor said that no possible rework of a '56 head would work as well as a stock '57...
    There were quantum leaps in Chevy ports in '57 and then about "63.
     
  6. dmarv
    Joined: Oct 10, 2005
    Posts: 943

    dmarv
    Alliance Vendor
    from Exeter, CA

    Anyone know what they are worth?
     
  7. 61TBird
    Joined: Mar 16, 2008
    Posts: 2,646

    61TBird
    Member

    Ebay will probably get you the most money.
    Just list them with a good description and use the html format to load up "free" pics!
     
  8. NINE INCH
    Joined: Dec 26, 2005
    Posts: 995

    NINE INCH
    Member

    Yes. That's correct. And do what He said:D
     
  9. Southfork
    Joined: Dec 15, 2001
    Posts: 1,412

    Southfork
    Member

    Can you post a picture of the end of the head? It would be insightful to see what casting marks these (probably rare) Corvette SBC heads have on the ends.
     
  10. rumblegutz
    Joined: Aug 29, 2008
    Posts: 76

    rumblegutz
    Member

    What are the casting dates?
     
  11. 49ratfink
    Joined: Feb 8, 2004
    Posts: 14,518

    49ratfink
    Member
    from California

    corvette weenies as well as 56 chevy restorers are all about casting dates. I had a standard bore 56 265 I had a hard timer giving away. I had several inquiries and all asked about the date.
     
  12. They only came on a '56 2x4 car and Corvette and have a unique double bar casting mark on the end of the head. Pretty rare.

    About 10 years ago I had a pair of '57 2x4 (and 250hp fuelie) heads, that have the unique single bar casting mark. I sold them back then for $1,800.

    I have a pair of real rare '57 283hp fuelie heads that have their own casting #, 3731539, but the triangle casting mark looks just like a PowerPac head. 'Cause of that, they won't bring the $dough$ of the others.

    I'd sell them to a restorer or run them as is. Don't port them
     
  13. Southfork
    Joined: Dec 15, 2001
    Posts: 1,412

    Southfork
    Member

    Good Info modifieddriver. Thanks! Are the cumbustion chambers on either the single bar '57 or the double bar '56 heads unusually small? What size are they?

    Anybody have any extra '57 Corvette fuelie head that they want to get rid of (539 casting that modifieddriver talks about above)? My friend gave me one a couple of weeks ago, but he couldn't find its mate.
     
  14. Don Moyer
    Joined: Jun 2, 2005
    Posts: 3,473

    Don Moyer
    Member


    When the Lazy 8 was orginally built, Jim went to GM and purchased one of these 56 265 vette motors over the counter. With some porting and a Giovanni cam the car ran 12 flat back in 57-58! The motor was still intact when my dad sold the car in 75. This summer, I found the guy that pulled the motor out in 1980! I purchased it back from him. Unfortunatly, he got the motor to sell the heads. Back in the early 80's they brought $2000! I would love to have your heads, but not at that kind of money, I plan to run the 57 power pack heads if I can find a set. Don
     
  15. Bob W
    Joined: Sep 14, 2008
    Posts: 686

    Bob W
    Member
    from Here

    57 FI heads (539) for the 283hp 283 were the same casting as the 1957 Chevrolet Passenger Car 283 four barrel engine (220hp 283).
     
  16. Bob W
    Joined: Sep 14, 2008
    Posts: 686

    Bob W
    Member
    from Here

    Corvette Weenie ????

    Bob :confused:
     
  17. JimA
    Joined: Apr 1, 2001
    Posts: 4,807

    JimA
    BANNED

    I have a pair of the Corvette Fuelie heads- ran them through e-bay last month but didn't hook up with just the right Corvette guy that wanted the dates cast in my pair of heads.
     
  18. NINE INCH
    Joined: Dec 26, 2005
    Posts: 995

    NINE INCH
    Member

    The big money lies in the 3740997 for 57'. Power Pak heads=Easy to find. 1539 57' F.I., Truck,or 4bc=little tougher. "997"=much harder to find and big $$$.
     

    Attached Files:

  19. Bass
    Joined: Jul 9, 2001
    Posts: 3,291

    Bass
    Member
    from Dallas, TX

    '56 "306" Powerpack, '56 "762" (2x4bbl) heads, and the super-expensive '57 "997" (2x4bbl) heads all share the same combustion chamber, which is smaller than the rest of the '57-up Powerpack heads. The valves are shrouded a lot more in these heads...the chambers are probably about 60cc.

    I have a pair of "306" castings, and they have noticeably smaller chambers than my '57 '539' heads. We cc'ed the chambers on my '57 "539" Fuelie heads and I was shocked to find out that they were 64cc.

    As far as '57 heads go, the "997" heads bring stupid money, but the easier to find "539" and "539x" heads have a better combustion chamber, and any diference in port size and shape is probably marginal at best.

    If you are wanting to use an early head for anything other than a resto, you'd be better off selling the "762" heads and starting with a '57 or later Powerpack head, as mentioned above.
     
  20. Bob W
    Joined: Sep 14, 2008
    Posts: 686

    Bob W
    Member
    from Here

    If you don't care about staggered or straight valve cover bolts I would use 520 castings. They have small combustion chambers and were used but racers at the Drags in Stock Eliminator.

    Bob
     
  21. buckeye_01
    Joined: Jun 20, 2005
    Posts: 1,441

    buckeye_01
    Member

    He said he wants to use the staggered bolt pattern.
     
  22. You could use any head, just braze some 1/4-20 nuts in the right place, and the casting for powerpack remained the same till they started putting bolt holes in the end of the head, in '68?
     
  23. dmarv
    Joined: Oct 10, 2005
    Posts: 943

    dmarv
    Alliance Vendor
    from Exeter, CA

    OK, here are some pics. One shows the combustion chamber, which I had cc'd at 56. The other shows the twin tower end casting. The last is the casting number.

    Dan Marvin, Owner
    Exeter Auto Supply
     

    Attached Files:

  24. HEATHEN
    Joined: Nov 22, 2005
    Posts: 7,585

    HEATHEN
    Member
    from SIDNEY, NY

    Yes, those are high $$$ heads. You can buy many engine parts with the proceeds.
     
  25. dmarv
    Joined: Oct 10, 2005
    Posts: 943

    dmarv
    Alliance Vendor
    from Exeter, CA

    Here is what has me confused. The casting date on one head is E219, the other is E259. Unless the "6" has been reversed, that would mean the casting was on May 21, 1959 for one head and May 25, 1959 for the other head. If I assume that the "6" was reversed than the day would stay the same and the casting year would be 1956. May 21, 1956 was a Monday and May 25, 1956 was on a Saturday. Did GM run the plants on Saturday?

    Dan Marvin, Owner
    Exeter Auto Supply
     
  26. Shifty Shifterton
    Joined: Oct 1, 2006
    Posts: 4,971

    Shifty Shifterton
    Member

    Weekend overtime is a lot older than the 50s.

    Casting dates are just that, casting dates. Not the date it was machined, or assembled onto an engine.

    Castings are produced by lot in the foundry, then shipped elsewhere for finishing. 4 Days apart at the foundry should indicate a pair that have been matched since 1956.
     
  27. 3Mike6
    Joined: Jan 2, 2007
    Posts: 704

    3Mike6
    Member

    Put them up for sale on the C1/C2 section of corvetteforum.com, as mentioned before, you shuold get a good price for them.
     
  28. ##### Make that Corvette GUY !! >>>>.
     

    Attached Files:

  29. Zeke Fishburn
    Joined: Jul 10, 2006
    Posts: 289

    Zeke Fishburn
    Member

  30. Zeke Fishburn
    Joined: Jul 10, 2006
    Posts: 289

    Zeke Fishburn
    Member

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2013 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.