I have a 73 351W in my 74 Mustang II with wiring from a 74 with a V-6. The easiest thing to do is to retain the points type wiring and go with a Pertronics ignitor system like you were asking about. You have no other wiring or crap to deal with with this setup, and it still will look original. Best of both worlds.
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74 Mustang II
351W 9" Rear 4.11's
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