I may just do a used engine, as the new option seems to be "vaporware". If this is legit and pricing is good, I will share info and maybe we can do a GB for a bit better pricing.
We will still need to source a few ancillary bits (fuel filter/heater if Northerners, glow plug control (if not a push button inside the trucks) what I will do, and did on my 1984 and 1985 4d 55t's as the relays were unreliable/inconsistant...

If the dealer gets back in a timely manner and is legit, I'll let you know.
Keep fingers (or whatever you have!! crossed, hehe!