MSD=Might Suddenly Die/My Spark Disappeared
No, they are not. MSD is not very good quality anymore, they've got the name and that's pretty much it... Go with Crane ignition systems if you want something good... but you don't need to, the factory setup is more than enough. If you have no issues with your ignition system right now, leave it alone and spend the money elsewhere.
Lots of people do make the mistake of doing the ignition on these cars btw, tons of advertising talking about power gains/hotter spark etc... etc... None of that will make a damn bit of difference with a stockish/bolt on car. Even with a HCI I ran the stock ignition on my Cobra and it was fine.
And of course do new plug wires if you need to, but just Motorcraft ones are fine. Or FRPP if you can't find Motorcraft. Don't fall for the "omg make your spark a meeelion volts" wires either... that's snake oil too.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.