I am glad you are trying out some new ignition systems rather than just sticking with the old Mopar transistor systems....I have used them, too both the Orange and Chrome boxes with OK results, but I know there are better options.

I used a Mallory dual point in my 440 race car...30+ years ago. I used a CD system 45 years ago in my '71 Valiant Scamp with the /6 and had good results and I used a Mallory CD system in my '87 Ram 318 and it is still running great. My newest race toy is using the GM HEI system mounted to the bottom of the OEM 440 distributor and I am using a Pertronix coil that I got from Summit. Most of my racing friends are using MSD stuff and I have too, but I like to experiment and I am cheap.