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#1
03-31-2026, 05:58 PM
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I think they had a bulletin on it.
Seems like it was for heat maybe? (would have to look for it) I also think it was on some other year(s)? 1967? 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
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#2
03-31-2026, 06:19 PM
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Strange cylinder head bolt
To help radiate heat away from the siamesed exhaust ports? Would love to see that bulletin. Interesting theory.
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Terry Hunt "He'd need 5 years in the fifth grade just to get an idiot certificate" Smokey Yunick re: Bill France Jr. |
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#3
03-31-2026, 06:40 PM
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I have this:
Nothing about the heat though. Probably wrong on that. 
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John Wallace - johnta1 Pontiac Power RULES !!! www.wallaceracing.com Winner of Top Class at Pontiac Nationals, 2004 Cordova Winner of Quick 16 At Ames 2004 Pontiac Tripower Nats KRE's MR-1 - 1st 5 second Pontiac block ever! W.E.C moment "Every man has a right to his own opinion, but no man has a right to be wrong in his facts." "People demand freedom of speech to make up for the freedom of thought which they avoid." – Socrates |
| The Following User Says Thank You to johnta1 For This Useful Post: | ||
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#4
03-31-2026, 08:15 PM
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So Ironic. I came across one while going through some of my bolts and wondered the same thing. If anyone needs a singleton let me know.
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Green Bay: A drinking town with a football problem. |
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#5
03-31-2026, 10:16 PM
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I’ve only seen this extended head bolt used on 1966.
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#6
03-31-2026, 11:25 PM
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Quote:
Please message me to let me know what you need for it and form of payment. Thanks. |
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#7
03-31-2026, 11:50 PM
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1966 with 093 head.
1967 with 670 head. |
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#8
04-04-2026, 12:51 PM
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Strange cylinder head bolt
“So that it may be properly torqued .” If all the other bolts with conventional heads can be properly torqued, why wouldn’t a conventional head bolt work in this location also? To quote Tom Vaught on these forums “Engineers do stuff for a reason.” but I can’t figure out what their reason is in this case.
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Terry Hunt "He'd need 5 years in the fifth grade just to get an idiot certificate" Smokey Yunick re: Bill France Jr. |
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