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Trickflow 240. What plugs to run?

Heimedw

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Just wondering what plugs you guys are running with this head. I'm running around 10:5:1 on 91 pump gas.
 
I'd use NGK #6987. That is a projected tip with a wide gap. OE plug on late model Mopar cars.
 
I can't give you a first hand experience but the recommended plug is an Autolite 3924. I would think that would be too hot for a 10.5 engine. The same heat range plug is recommended for the eddy RPM head and I found it too hot at 10.2:1, I went one heat range colder in an NGK - BCP6ES-11. For yours I would start with a NGK BCP7ES-11 and see how it looks after a good run. It is always best to go colder first, obviously you need the tune right also. The plug Andy recommended has a heat range the same as the plug I use but it has an extended electrode - this may well be the way to go.
 
Curious what kind of headers you are using with the Trick Flows?
 
Going with tti 2" primary with 2 1/8" step up 3 1/2 collectors
 
I just purchased some 240s as well. I am running about 10.25:1 with the 916 heads. @andyf, would your recommendation stay the same for that?
 
Thank you for all your input guys.
 
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