You can find articles/threads that the durapark has problems at higher RPMs, I have no experience with that myself.
@Panterdoug: i don't understand your reply about MSD issues to my Pertronix problems. I assume you refer to Mallory belongs to MSD. The Distributor I have is an older system, pre-MSD.
I apologise for creating confusion. I was referring to the MSD. Not the Petronix. It was just a suggestion from me that if a person was going to look for another system from what they had, consider the reported MSD failure rates,
I have used Petronix in another vehicle and no longer do. I actually went back to an original dual point distributor for that car. I had no issues with the Petronix but for my application, it had limitations.
I have read reports though that some users of Petronixs were carrying new spare units with them. Whether that was for lack of faith in it's dependability or actual bad experiences with them, I personally can not say.
The Pantera, because of the location and lack of access to the distributor, has unique considerations, I have found the Motorcraft point-less distributor to be 100% dependable over a period of 40 plus years. The only issue that I had with it was integrating the Ford control box for it to the Pantera tachometer. That is a general PITA and I found that the Pantera-Electronics Ignition Controller device as a great simple and dependable solution. That I have been using since 2007.
I hope that this clears up the confusion that I created for you but if you have further questions for me, I will attempt to answer them with my experiences.