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[GMCnet] Spark Plugs For GMC [message #76744] Mon, 15 March 2010 14:22
John Wright is currently offline  John Wright   United States
Messages: 118
Registered: September 2008
Karma: 0
Senior Member
This is a list of plug that I have found that should work in the 455 & 403
engines. If you have others that work you can add to the list.

Brand 455 Eng Style 403
Eng
Style

AC/Delco R46SZ Std. Same

AC/Delco 41-818 Plt. Same

AC/Delco AC#7 Plt. Same

Autolite AP847 Plt.
847
Std.

Bosch 4023 Plt.
4022
Plt.

Bosch 7921 Std.
7920
Std.

NKG 4536 Std. Same

NKG 7293 Iridium Same
--
J.R. Wright
GMC Great Laker
GMCMHI
TZE Zone Restorations
77 Eleganza II (For Sale)
75 Avion (Under going Frame up Restoration)
On Location at Florida Space Coast
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