I put one in my 273 in my '65 Barracuda almost 2 years ago. It's been working flawlessly since. The only problem is, if something were to go wrong you can't get parts off the shelf, whereas a Mopar ignition system you can get parts anywhere...that's what all the people say, but I haven't have any problems with it. It's completely hidden except that there are now two wires from the distributor. You could cover them in heat shring tubing then it would look like one.
Neil.