intake ? - Pontiac GTO Forum
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post #1 of 13 (permalink) Old 10-19-2014, 08:35 PM Thread Starter
 
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intake ?

Quick question, will a 1965 389 4 brl intake fit a 1967 gto 400 block.
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post #2 of 13 (permalink) Old 10-19-2014, 10:05 PM
 
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When the new 1967 GTO came out, there were many 67s running around with tri-powers from the previous years. Your asking about the 4 barrel but yes the 65 will fit.

Edit: The 65 manifold should fit HEADS from 64 to 71 era. Someone check me on that. Make sure someone has not changed the heads on your block.

Last edited by Roger that; 10-19-2014 at 10:23 PM.
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post #3 of 13 (permalink) Old 10-19-2014, 10:23 PM
 
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[B]Yes, it will I owned 1965 Gto with 1968 400 block and heads and breefly ran original 389 intake [and carter 4 barrel carb, engine ran very strong, but eventually upgraded to 400 manifold and 800 cfm Quadra jet carb, pontiac engines of this era 60's and 70's, many parts are interchangeable, heads,intakes, exhaust, thats impossible with other auto makers of the same time period, engine sizes from 326 -455 interchange.
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post #4 of 13 (permalink) Old 10-20-2014, 08:32 AM Thread Starter
 
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Thanks guys, it has the 670 heads.
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post #5 of 13 (permalink) Old 10-20-2014, 08:56 AM
 
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64 and earlier heads have a different bolt pattern than 65-79. But yes, a 65 intake will fit 670 heads (which were from 1967).


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post #6 of 13 (permalink) Old 10-20-2014, 09:57 AM
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I hope you have dished pistons to use with those 670 heads, or a bunch of 100 octane fuel!
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post #7 of 13 (permalink) Old 10-20-2014, 06:32 PM Thread Starter
 
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I heard that i would need higher octane gas. If i use high test and those octane boosters with some lead additive would that work.
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post #8 of 13 (permalink) Old 10-21-2014, 09:41 AM
 
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I am wondering why you want to put that square bore manifold on the '67 though. The '67 manifolds can be found and are pretty reasonable. They work much better, especially with the Quadrajet that came with them.

When the only tool in your toolbox is a hammer, you tend to see every problem as a nail.
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post #9 of 13 (permalink) Old 10-22-2014, 06:22 AM Thread Starter
 
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This is my 21yr old sons car. The engine didn't have an intake. He found this one for $30.00. This is his dream car. He wants it as a driver but close to the right parts. I told him an aluminum intake would give him more ohmph. We went to a local car club meet and greet club called spindles and they had a 67 there. It had the aluminun manifold and he was not all that impressed. He plans on using a holley 750 vac 2nd with electric choke. I read where all we need is a spacer to manifold for this. He does plan on someday getting the tri power
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post #10 of 13 (permalink) Old 10-22-2014, 10:06 AM
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Originally Posted by krallstar View Post
I heard that i would need higher octane gas. If i use high test and those octane boosters with some lead additive would that work.
In a word, no. Even starting out with 93 octane fuel as a base, it'd take so much of the canned booster to raise the octane 'enough' that it'd probably be more than double the cost of just finding a source for 100 octane racing fuel, and the fuel would have so much 'booster' in it that there'd be very little energy content left.

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