The later model Mopar Perf distributors supplied in the kits have a very cool feature that allows you to shorten the slots reducing mechanical advance--thus you get to set initial advance higher without the mechanical adding too much later--the more initial advance allows any HP unit with a cam to idle MUCH better but then limits the amout of advance the weights add in as RPM goes up--having your cake and eating it to. a BIG plus.
The Mopar Chrome box is an amzing unit WHEN coupled with a high output coil like the old yellow Accel--This makes a killer package that will ignite 12:1 at 7500 rpm easy!
The orange box is a junker--parts store units are better
To answer your question there are guys like FBO that offer super boxes according to them--I have never run one.
MSD is about the best you can do no matter how you trigger it--it WORKS It WORKS GREAT! Firecore does make killer wires but so do many others--fresh cap, rotor, quality wires routed right, Chrome box with hot coil or better yet MSD like a 6al can't be beat --NO ignition is worth a darn if not grounded right--quality grounds at many places is the key to no trouble
Again..any Mopar box HAS to be grounded well or else--no paint behind it, star washer, etc get it grounded or it will run like poo