99 camaro alum 6.0 block, L92 heads (402) all the supporting internal parts, pump gas motor, HSW Brute force wet kit, set up for 100 then going to 150. Which plugs have you had the best luck with, I though about going with TR7's?

 

Another question, what is the differance between the NGK TR6 and the NGK TR66

 

Im also interested in this. I assume you are running TR6s now for NA? I would think TR7 would be needed for spray on a 402/408.

 

how much are TR7's compared to TR6's?

 

I spoke with Matt@HSW today he recomends TR6 .035-.038 for my application.

 

I am using TR6's.

Bill

 

Be a man, Go with TR8's - I noticed no diff N/A

 

I just paid $17 for 10 TR7's, TR6's are about the same price.