[911 SC 1979]

Hello All,

I am considering converting my standard 911 SC to a twin spark plug set up. Here are some questions: -

1) Is it even worth doing for a road car, never, nor will be used on the track?
2) Along with the additional tapped hole for the additional spark plug, will I have to modify/get different pistons?
3) Apart from a new twin distributor, what additions/modifications do I need to make to the ignition system?

Many thanks for the help.