David,
An MSD type ignition system would certainly give the car a good kick in the butt. As for swapping out the Bosch coil for a "performance" coil, traditionally the stickers that come with the "performance" coil will make the car faster.

On a more serious note: we did find Nology wires helped on the Porsche 911 capacitive discharge ignition systems as for coils the easiest way to see if what you are getting is worth the money is to check the weight of coil. The heavier it is the better it is (typically).

Andrew