Assessing the damage: looks like the main culprits were a damaged thermistor wire; a clogged Bowden tube and a clogged nozzle.
The original heat block must have gone over temp and it just slagged so much stuff. I’m lucky I didn’t create a fire.
But the new block, tube, and heating assembly appear to have been basically drop in replacements. Working on getting an octoprint and setup so I can give this bad jammer a trial run