about spark plugs http://www.ngksparkplugs.com/techinfo/spar...1000&country=US

Speaking of... at what point do you start noticing a need for colder plugs on a '7? And does anybody here run colder plugs? Any information on whether that's helped with detonation issues or plug fouling?

we usually run 9's once the cars modded. since you're tuning a haltch keep the 7's and 9's, you prolly will foul a plug or 4. once you're ready to make power then go for the 9's