its going to cost you some money to do it right, at least if you want to run veggie in cold weather. But if you have sources for the wvo you should jump on it now before someone else does and store up as much as you have room for.
most of these trucks have two tanks which is perfect in some ways, but for cold weather you need to heat one of them by installing a heated fuel pickup and that creates a problem: steel and wvo are not a good mix but once you heat the wvo you eventually get a real mess in the tank. The oil is heated and cooled every time you drive and then shut down plus it mixes all around and eventually polymerizes and the inside of the tank gets coated with a thick skin of polyermized oil which eventually works its way into the fuel lines and then sooner or later will clog the fuel lines and you will stall on the highway and not know why. Trust me on this - i have seen pictures of the inside of steel wvo tanks and they are a real mess. Plus the polymerized oil will clog your fuel filter much faster - and if you are running both fuels through the stock filter that means you can stall out on the road. Not long ago i read a story about someone who had a shoddy wvo system and the car stalled and they got rear ended by a truck going 55 mph.
not trying to discourage you, but if you want to run veggie in cold weather you basically need an aluminum truck bed tank with a heated pickup and a fuel filter just for the veggie and that also needs to be heated.
the good news is that these IDI engines are perfect for veggie, they run smoother and quieter on veggie and the stock mechanical lift pump is also perfect for veggie since it is very powerful, compared to most electric lift pumps, making them ideal for veggie.
also, these injection pumps are not the greatest for veggie but they will work fine if the oil is dry. One small shot of water and the pump is junk; and if you run oil with emulsified moisture in it (and most waste veggie has moisture in it) it will wear the pump out a lot faster. So good filtration is essential.
i have 30K wvo miles on my other ride, which is a step van with 6.2 and that will run veggie in just about any temp. i just got my f250 last week so i have not converted it but i will soon - this will be mostly for warm weather use since i am just going to use one of the stock fuel tanks and not bother heating it. But i will have a heat exchanger and will also heat the fuel filter. If need be i can talk more about when it is done.
Paul