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I just wanted to share the results of my research.......

NGK 2771 plugs are 1/4" shorter than AC Delco R44T and a little more than a 1/4" shorter than Autolite 25 series plugs. I didn't get to compare them to Accel but they have a lot of room for those tight headers, which was my problem. I can fit my finger in between the NGK plug and my summit headers (1-5/8" primaries).

Hope this helps:cool:
 

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Registered
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768 Posts
I just wanted to share the results of my research.......

NGK 2771 plugs are 1/4" shorter than AC Delco R44T and a little more than a 1/4" shorter than Autolite 25 series plugs. I didn't get to compare them to Accel but they have a lot of room for those tight headers, which was my problem. I can fit my finger in between the NGK plug and my summit headers (1-5/8" primaries).

Hope this helps:cool:
Good info, I have one plug with the same issues. Is the NGK a small short reach tapered plug, or the 3/4 inch reach shouldered plug?
 
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