Welcome!
It's unfortunate, but the feedback system is pretty much 'all or nothing'.
EGR is actually good to have. It greatly increases the advance you can run without spark knock.
Generally the sensors hold up, but the older distributor mounted TFI modules were known to fail from heat.
We have a bunch of members from strict emissions states like California who must run their truck as it was delivered.
They seem able to get the whole feedback system working.
If you don't have restrictions like that and want to eliminate your computer/distributor/feedback carb/MAP sensor please consider offering them to another member that desperately needs them.
Duraspark II was found on almost all of these 49 state trucks before 1984.
Finding the correct wiring harness can be difficult and aftermarket kits are expensive and incomplete.
The all in one HEI ignition is a fairly simple solution if you have some experience with older automotive electric systems and tuning.
Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.