NGK plugs

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Tim Penton · #1 08-17-2005, 01:08 AM

Tom, Rob, & SYC memebers, Which NGK would you recommend for a fairly stock (I did not build this motor) 325 hp 1968 396. The motor does have a Holley instead of a Q-jet and it also has headers. The motor has a small lope at idle. Thanks, Tim E. Penton, Jr.

Chevy454 · #2 08-17-2005, 01:34 AM

Would it use the same spark plug (physical dimension-wise) as an 840 head? If so, try an R5671-7...

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