I use the Pertonix Igniter I on three cars (part # 1181, I believe). I highly recommend it...best $100 you'll spend.
I also recommend their 40,000v Flame-Thrower coil but it requires a full 12 volts...your stocker uses about half that, because a full 12v will quickly fry the points. A resistor wire from the ignition to the coil is used to reduce the juice to the coil,..so you'll have to replace it with a 12 or 14g braided wire or run a jumper from your fuse box (from the connector that says "IGN") to the coil.
After insalling both, you'll have a stock-looking and fitting ignition that is very stable that will rev to 7000 with no problems. You'll also find that cold starts are much improved.
Search "Pertronix" on this site,..you'll find many who are fans,..very few who aren't.