Duraspark II

Try running a GM HEI module instead of the sometimes questionable aftermarket Duraspark module. Some of the Ford guys have been doing it, believe it or not!  Some bake the original module and remove the potting/electronics, then mount a GM HEI module inside, using the case as a heat sink. Clever! Search "HEI module Duraspark"

I know there prone for failure never had issues other than the pickup going bad but I think it all about the ground on them keep it clean and tight

The problem is that Ford stopped using the Duraspark in the mid 80s, 89-90 if you count the TFI systems which are somewhat similar. Jeep used the Duraspark through the last of the Grand Wagoneers with AMC 2360s -- 1991. There really isn't much demand for the modules except for old car guys. Ford stopped making modules in the early 90s, and the aftermarket modules just aren't as durable. It's much easier and cheaper to wire in a GM HEI ignition module, which is much more relaible, than it is to swap the whole thing out, though that's what many do.