iv been runing the NGK TR6's, have had good luck with them. been seening alot of ppl useing the autolite plugs. what part# or what ones do i need to get? been thinking about giveing them a try. is it the 104's or 103's i need? and what number for 2 steps cooler?

 

Did you miss the sticky? https://ls1tech.com/forums/removed-locked-thread-graveyard/456380-spark-plug-reference-chart.html

 

LOL my bad thanks