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[GMCnet] Newest, bestest spark plugs? [message #255009] Thu, 10 July 2014 19:35 Go to previous message
kelvin is currently offline  kelvin   United States
Messages: 608
Registered: February 2004
Location: Eugene, OR
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Senior Member
So what's the latest answer to, "Which spark plug should I use?"

455 in the '73. I've been using AC Delco R46SZ since 2005. 20,000
miles on them so it's probably time to swap 'em. Haven't pulled them out
yet but they've gotta be a bit rounded. I'm happy with these plugs but
willing to entertain other ideas.

Kelvin
'73 23' in Eugene, OR
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