Darrone3dr, I would recomend this for stage 3 onwards but would
do this anyway as it is better than the dizzi cap which dont forget,
has 4 spark gaps and moving parts that all wear out too.
Plus the king lead (coil to dizzi cap) is an organic carbon product which
wears out. Also, it is less suseptable to damp starting problems.
Generally, the only part that will ever need replacing is the spark plugs
provided high quality metal cored leads are used.

One word of caution though, coil packs generate significantly higher energy
pulses which can kill. Never places your hands near or on any part of
the high tension system whilst the engine is running.
I have seen gaps of 2 inches jumped by a spark on my engine with the lead off !