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I wanted to know what is the best plug to run? These are my mods. Currently running AC Delco Rapid Fires. If I go to a colder plug which one to run? Recommend? And what gap? I will be trying to get an MSD coil but not anytime soon but I do have Magnecor 8.5mm wires.

-100 Shot NOS
-Ported Throttle Body
-Ported Intake
-Ported and Polished Heads
-Stainless steel valves
-Comp Cams 306 Hydraulic Roller Cam
-1.6 Ratio Magnum Tip Roller Rockers
-Comp Cam Chromemoly Push Rods
-LT4 Hydraulic Roller Lifters
-LT4 Knock Module
-Magnecro KV85 8.5mm Competition Wires
-Edelbrock Midlength Headers
-G2 Cold Air Intake
-K&N Air Filter
-3.42 Gears
-Ported MAF Sensor
-GM Performance Timing Chain
-180 Thermostat
-Air Foil
-Com Cams Dual Valve Springs
-Flowmaster 80 Series Exhaust
-No AIR
-No EGR
-No Cats
-LG Performance Lowering Kit
-High Performance Motor Mounts
-Stage 2 Clutch
-Free Mods
-Hypereutectic Pistons
-Bored .060
-Computer dyno tuning By Speedworks

 

ngk tr6 or autolite 104,gapped around .035

 

I 2nd that.