You don't have coil packs like modern GM engines, but wiring harnesses that include, spark and fuel management, among other things. These will run back to a control module. Here is a single plug connection:
To simulate these on a Ferrari SA Aperta:
I drilled into the cap molded on the valve cover (much like the Diablo GT has). I used a combination of ignition wire, thin heat shrink, thin guitar string and thin Pro-Tech braided lines to simulate the effect. Since the Aperta control module was not visible, I only had to get the harness to an area where it would approximately be and not worry about finishing connections on that end. You'll need some good photos of the engine area to get a representation of the effect. It will take some time, but the result is worth it.
Here is a reference to the Lambo: http://www.eurospares.co.uk/parts/lamborghini/diablo-gt-1999/all