Which spark plugs will I need for my 302? heat range, etc.?

thanks

That depends on your motor in general, ignition system, Your driving habits, timing, heads, ect. I know on stangnet a while back there was a discussion with almost everyone agreeing on why copper plugs were better for performance, but you could widen the gap on platinum plugs to achieve the same effect. I'm not too sure of this myself but it is still food for thought.

NGK!