Jay,
I may be wrong but I think the 52xx is a truck plug and is of different
design from the 39xx series. They can have the same heat range and not work
good in our circumstances... I think, I can say that most are running
3923's in V-6 and V-8's.. As you well know, this bunch has tried them all
and a few people have different brands as well that they swear by. But, I
would guess that 80% or better use the 3923.
Somebody e-mailed a site about plugs this afternoon,, it was real
informative.
Probably find in the digest or archives. Bill
SEMIHEMI01 (Bill C.) 2001 QC, 4.7L, 5spd. 3.55 LSD, K-N Cool-Air, SilBlades,
10w-30 MOBIL 1, 180 T'STAT, GIBSON 3" Single Side-Swept cat-back, G-TECH,
<A HREF="http://hometown.aol.com/semihemi01/">"THE DAK"</A>
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