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07-04-2009 11:40 AM #1
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- Join Date
- Jul 2009
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- Apple Valley
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- 1
Spark plug for BBC Square Port Heads?
Engine: Gen VI 454 Magnum
Local speed shop set me up with NGK BR6FS plugs.
Does that sound right?
I gapped them at .40 thousands for use with MSD 7AL
They're going in kind of hard? Maybe due to some spray paint on threads on head when engine was painted?Last edited by mrmustang; 07-04-2009 at 01:22 PM. Reason: link not readable in current configuration
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07-04-2009 02:30 PM #2
CHR Member
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- Aug 2007
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- Dunedin
- Car Year, Make, Model: 1976 Cadillac Seville with 454 Chevy
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- 421
I used autolite 105's and had the same problem, threads in the heads need a cleanup.
Grease up a tap and run it through, the grease will hold the small amount of crap you'll get.
Must be a problem with Gen VI heads.
Last edited by Geezer2; 07-04-2009 at 03:41 PM.
Buying parts I don't need, with money I don't have, to impress people I don't like 
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