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Discussion Starter · #1 ·
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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