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#1 |
Registered User
Join Date: Sep 2008
Location: Ogden Utah
Posts: 286
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questions about my heads
I have 462264 no cast into my heads and according to the chart they are 75-86 year head. But my heads are stamped 70 on this insude..and have a single trianle between cyl #2./4 It's really been a challenge trying to figure out what heads these are.
http://www.frontiernet.net/~ennis/castingno.html Could the years listed just be incorrect. I don't see how something that's stamped into a head could be wrong. |
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#2 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,736
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Re: questions about my heads
If the casting number is 462624 they are 75-86 350 or 400 heads. car or truck. They were not available in 1970. If you are reading the date code, it is probably 7-0 (july 1980) If they have the steam holes they would be from a 400.
__________________
67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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#3 |
Registered User
Join Date: Sep 2008
Location: Ogden Utah
Posts: 286
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Re: questions about my heads
Where are the steam holes located. Also they say 70 in the upper portion of the head near the intake, not 7-0. I have seen many heads and jsut assumed that that was the year as it is with most other heads. I was also reading late last night that there were service replacement heads with the same cast no., but that does not make sense either because of the 70 that's stamped in them.
Apparently the service replacement heads has thicker wall casting. I'm stomped. There are some smaller no's that I cant hardly read. Should I try and see what those are. They are the date numbers i believe. |
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#4 |
Roadtrip!
![]() Join Date: Feb 2003
Location: Grand Rapids MN
Posts: 13,736
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Re: questions about my heads
There will be some smaller holes between the combustion chambers if they are 400. The date code will be something like I-28-0 for example. I don't know what the 70 stamped in there means. You will have to go by the casting number and date code. It can be broken down more from there. Do yours have an extra exhaust mounting hole? (where the manifold bolts up?)
As far as replacement heads having a thicker casting? I am unsure of that one.
__________________
67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto |
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