With my 3.1 pulley, what spark plugs to run?

[Sven the Sexman]

It can indicate the temp. If they are nice and white is nice and lean. Golden is a good range, dark Brown or blackish will be too rich. Too rich indicates you COULD go a little warmer. Too Lean COULD be a little cooler. Obviously this is dependent on a proper tune.

Edited before the tuner guys get here. LOL

[Iceman6669]

Edited before the tuner guys get here. LOL

Good looking out.