I like Autolite sparkplugs - they've proven themselves well over the years in my Fords .....so I'm prone to keep using them. The other day I ran across a box of 124's, they are the next step colder than the 45's and are the standard type of resistor construction. Would they be a good choice for a bit cooler tip than the 45's running in my driver car (which look a little hot to me). The 124's are the coldest resistor type 18mm x .468 reach plug shown on my Autolite heat range chart.

Is anyone already using this plug? and what sort of induction/ignition set-up is on the engine?

 
 Steve Metzger       Tucson, Arizona