DON - The N/A 7.3 IDI is no worse than the N/A 5.9 Cum-a-part or even some of the early turbo'd 5.9's, and worlds better than the 6.2 & 6.5L GM.
The IDI design does kill combusion efficiency, the injectors & GP's have to be in the "pre-combustion cup", VERY old technology, but if the GP's & GP controller are up to snuff, and you plug the block heater in for 2-4 hrs they start right up even below Zero C. I plug my PSD in on the timer when it gets below freezing and I need it to go somewhere. The fact it starts & runs as soon as I turn the key saves a lot of stress & strain on the batteries & starter. Guess that's why my factory starter is still working great after 9+ yrs of daily use and another eight yrs of infrequent use. Ohhh, and the factory batteries lasted 6-7 yrs, and the replacements, now 10-11 yrs old are still going strong!
ALL my Ford p/u's have had great heaters, the '78 was so-so, but better than most, but the '87 & '96 are the ONLY vehicles I've ever owned that after half an hour the Wife reaches over and shuts the heater off when it's really cold, like below Zero F. You need a good thermostat, and a winter front in cold weather helps to keep the operating temps up, also increases winter MPG.
I've never really seen any complaints on forums about the injectors on the 6.9 & 7.3 IDI's. Like I said, they're cheap to replace compared to the HEUI injectors. I've seen complaints about the HEUI injectors on PSD's, but.. well, 301K on my PSD and never had a single issue with an injector... EVER.
I was wondering when you'd comment about that e-mail I sent. Way it looks to me you passed up $10,000 you could have spent on CC's or more mopeds.
I really don't have a problem with Cummins engines, I've driven in Cummins powered trucks well over a million miles. And only had to hitch rides home twice, 75 miles & 165 miles when they suffered catastrophic failures, two different engines, a 903 & 290 HP 855. And there were other issues, like the leaky oil pan on the 903 300 miles from home, and leaking injector bypass lines on the old 165 HP Cummins in my ready-mix truck, common problem, that resulted in me running out of fuel before NOON one day when the other trucks that didn't leak fuel could run all day. But running out of fuel DID make the shop mechanic fix the leak. Plus the leaking hot diesel fuel cleaned ALL the grease, oil, & cement off the drivetrain, transmissions, axles, frame etc. really well, shined up the paint too.
I don't mind debating the merits of Dodge vs Ford trucks with you. I just know you've never had a Ford or a Ford diesel. Compared to my 33 yrs of Ford truck ownership and half million miles of driving, only three trucks in all that time. I'm not counting the '48, '52, '56, & '67 Ford pickups Dad had and that I drove. Wish I could find that '56 F350 SRW pickup w/ nine ft long step-side box! 272 V8 & creeper low 4-spd.