Spark Plug Gap with Lucas Sport Coil ?

[Andrew Miller <amiller@JetForm.com>]

        My spitfire recently underwent a Lumenition Transplant.  The
patient survived.  I took the opportunity (ok I was feeling paranoid) to
replace the stock coil with a Lucas Sport Coil.

        Now the box suggests a larger sparkplug gap for greater fuel
efficiency.  Does anyone know the suggested gap ?

        Thanks,

        Andrew
        78 Spitfire