Re: [Chevelle-list] Plugs for Big Block?

[Chevelle70SS454c]

Diane,    Yes, you are correct in what you say about spark plugs. It is not the motor size that dictates the plug that you should use but the heads that you are using. For instance, between a World Products (Dart) head and a Brodix or factory head, they can all use different plugs. It is indeed the depth of the threads in the head that dictate what plug reach you should use.        Ken