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spark plug dilema

Old Apr 4, 2005 | 08:20 AM
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Default spark plug dilema

Hi All

I have a delema. After looking at the specs for plug gaps for 1975, it states a .060 gap for the plugs. I am running pre 1975 ac plugs for a 350. I noticed before 75 the gap is .035 . I have a 10.1 comp ratio, and a .480 cam in the non stock 350, what gap should i use? I know 75 was the first year for hei, and spec for plug gap for 1976 is less at .045.

Any recommendations what gap i should use?

Thanks
Andy
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Old Apr 4, 2005 | 08:24 AM
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Originally Posted by AndyMacLeod
Hi All

I have a delema. After looking at the specs for plug gaps for 1975, it states a .060 gap for the plugs. I am running pre 1975 ac plugs for a 350. I noticed before 75 the gap is .035 . I have a 10.1 comp ratio, and a .480 cam in the non stock 350, what gap should i use? I know 75 was the first year for hei, and spec for plug gap for 1976 is less at .045.

Any recommendations what gap i should use?

Thanks
Andy
If you have a HEI, then .045 to .060. If you are running a non-HEI, then .035
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