I've never heard of "spark angle word" but we all know what a Spark OUT jumper is.
The Profile Ignition Pickup is the spark trigger in side the distributor.
But since you have recently replaced the distributor, and it hasn't resolved the issue, I'm not sure what to suggest.
It doesn't seem a harness failure would be heat related.
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.