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Bobby..I run the AR3924 plug in my GTX. Eddy heads with 10.25 compression. Is there a BETTER heat range for street driving that you're aware of?  THANKS!  
Randy here is the chart i have. but it is the race plug chart. heading out the door to go fishing. but i am sure somebody smarter than me can recomend a plug for you. thanks Bobby
3520 pound race ready 1973 Street/Strip Dodge Dart - Stock stroke 440/727
10.49 @ 125.0 on 93 pump gas & ET Street Radials. More to come...
( SGT Miller) Proudly served 12 years in the US ARMY RESERVES
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