Well it looks like after 40 years the cd ignition boxes have finally given it up. I know many of you have used MSD, Crane and PermaTune replacements. I'd really like to try and keep the engine compartment stock looking. There is a company in Florida that rebuilds Early 911 boxes called Specialized ECU Repair. Has anyone used them? How about AMS out of Germany? I know that PermaTune can put their cd unit in my original boxes but at $500 to $600 per box I was thinking a rebuild might be more cost effective. Any thoughts?