Wow thats alot of info to just type out. Mainly what I was trying to get at was just because you have a 460 for free does not mean you are any closer to having a 460 in your truck. Knowing the year of the engine would help alot for starters. Being yours is a 1990 I would guess that you would want to retain your fuel injection, If its a carburated engine the heads are different and will not accept the fuel injection intake. I am unsure what sources you are refering to for the needed info, Nothing on your truck will just bolt up to the 460. You will need all the items that I previously wrote out earlier, plus a pretty good idea what you are up against. If you are unsure the components that are required by your truck to run it than I would highly reccomend you do not attempt this swap. But if you insist I would have to insist that you look around for a 1990 f-250 with a 460. You should be able to find one for 1000.00 or less, depending on your location I guess. But the more you spend on the parts truck the easier your swap will be. If that 460 you have runs, sell it and use it to buy a whole truck. The PCM is the brain of your powertrain, Underneath your steering column you will see a bunch of wires coming out of a rectangle plug approx 2 inches wide by about 4 inches long with a 10mm bolt holding it in place. To remove it, obviously take out that bolt, then go in your truck and remove the drivers side kick panel, behind that there is a chrome box held in place by another 10mm bolt and a white plastic clip, remove that and the box can be removed, this is the PCM (powertrain control module) (computer) The reason you need a 1990 truck is in '88 and '89 the wiring harness is different from your truck, They use two fuel pumps and a few other small details that will be a pain in the butt. !990 and '91 will be the same for sure, any other years you will need to research, but for a true bolt in swap with minimal headaches get a 90 or 91. Hopefully this helps, dont hesitate to ask any more questions