Spark Plug recommendations??

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604

604

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Brooksville, KY
Just about have my new engine done, and was wondering what plugs I should use? Wanting to stick with good old Champions, but not sure what heat range to use.

The engine is a 318
9 to 9.5 / 1 compression
Comp cams XE268H-10 cam (.477, .480 lift, 224 230 @50)
273 closed chamber heads, ported, 1.88 - 1.60 valves
LD4B Eddy intake
Eddy 600 carb for now
Factory ex manifolds for now (changing to Dougs headers soon)
TTI 2.5in exhaust, with flowmasters, and cut outs
Mopar electronic ignition conversion kit.


Thanks for any advice!!!!!!!!!!!!!!
I am no good at picking plugs.
 
i have used all of these with great results, all gapped at .35 .autolite platinum 85s , NGK, champions , accel , bosch . i really dont notice a difference enough to care which i use. im sure others have a specific brand they prefer.
 
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