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#1 |
Registered User
Join Date: Apr 2006
Location: va
Posts: 553
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head Id
I have my valve covers off and want to Id my heads. where are the casting numbers and is there a site where I can ID the heads with the numbers
thanks |
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#2 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
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Re: head Id
The are going to be between the rocker studs. You can't really miss them. Should be a 6 or 7 digit number like 3927186 or 333882. There will also be a letter/number code that is the casting date of the head. The first digit will be a letter representing the month, the second will be a 2-digit number representing the day, and the third will be the single digit number represent the year. For example, a head with the casting number 3973487 and a date code of E 24 2 will be casted on May 24, 1972.
You can ID the numbers here: http://www.mortec.com/castnum.htm
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! Last edited by 67_C-30; 09-25-2007 at 12:23 AM. |
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#3 |
Registered User
Join Date: Apr 2006
Location: va
Posts: 553
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Re: head Id
I didn't know if i should save these heads. I don't think there anything special
458642 |
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#4 |
I have a radical idea!
Join Date: Jan 2005
Location: Sweet Home Alabama!
Posts: 6,513
|
Re: head Id
458642.....75-84...350..........350
468642.....76-up...350/400 If they aren't cracked I'd keep them. They aren't anything special, but def not junk. They would have hardened valve seats compatible with unleaded fuel unlike older heads.
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'67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! |
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#5 |
Registered User
Join Date: Jul 2006
Location: Fair Oaks, CA
Posts: 475
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Re: head Id
The difference in the 468642 between the 400 and 350 is the 400 has steam holes drilled in the heads its a small 1/8 hole 2 in between each cylinder.
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1968 Short Fleet 350/700r4 http://67-72chevytrucks.com/vboard/s...d.php?t=249435 1997 Bagged XtdCab Vortec350/4L60e http://67-72chevytrucks.com/vboard/s...44#post2286144 1993 XtdCab Longbed 4x4 6.5Turbo/NV4500 "Daily Driver" 1985 Toyota XtdCab 4x4 22re/W-56/Dual T-cases, Doug Thorley Header, Homebrew front and rear spring packs, Tons of Mods to suspension and drivetrain, 35" boggers, coming soon ARB's and 5.29's, Possible 4.3/700r4 swap |
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