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Old 03-03-2006, 07:57 PM
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454 In A Jet Boat Have Sparkplug Question

Hey guys i have a 77 jet boat with a 454 in it. Pretty mild cam 10:1 compression just a nice healthy big block.So my question is i'm getting her ready for spring and was wondering if you could tell me what spark plug i need to get. Like an actual part number. I called kragen and since i don't have a specific application they are no help to me and i could just put the same plugs that are in there now but there just auto-lite and i wanted to put some good NGK or something else a little more high tolerance......thanks guys....any other suggestions would be appreciated...

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Old 03-03-2006, 08:00 PM
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http://nology.com/crossref.html

use this cross reference chart to find the spark plug you need....
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Old 03-04-2006, 06:50 AM
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Spark Plugs

I use AC Delco R43-T plugs in my Big Block LS-6 ,they are a bit of a cold plug but seem to work quite well.Also the Big Block is known to be hard on plugs so I just change them every year.Hope this helps.
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Old 03-04-2006, 07:50 AM
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Ditto to what Guy said.
I have a 78 Brendella Jet with a bigblock in it. I run the 43s as well. Never an ounce of concern from them
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