Looks like they don't mess about when they modify a car down in South Africa.
Take a look at these V6 155s

[ame="http://www.youtube.com/watch?v=enTkRuojFwk"]YouTube - 155 Alfa rear mount twin turbo - Gotech[/ame]

[ame="http://www.youtube.com/watch?v=RhiuNINiuN8"]YouTube - Alfa 155 twin turbo - Gotech car at Alfa Club of SA concours[/ame]

Madness also available in white:

[ame="http://www.youtube.com/watch?v=soV3TF6DkK8"]YouTube - 155 3.0l twin turbo mid mount[/ame]

[ame="http://www.youtube.com/watch?v=yahDruL_3Zs"]YouTube - Alfa Romeo 155 mid mount 30l TT.[/ame]