I would also take the time to replace the timing cover gasket. I think it is a minor weak spot on the trucks, major on the cars. They tend to shrink and leak. The original on my '92 truck blew out and dumped the cooolant. On a taurus, there was an exhaust/cat a couple inches away that would literally cook the gasket. Did one a while back on a taurus with 40k miles...
I have dropped both a 2001 and a 2007 3.0, both taurus engines, in my '92 truck and what was said above is spot on. Use your accessories, mounts, intake, fuel injection, electronics, etc. I also had to use my oil pan and pump (I think this is required with 2wd pre 97 trucks?).
Later blocks have some revisions that make them a it better like 92 on was roller cam, 00? and up had a better head bolt design, later models had a different piston design, etc. The one sticky wicket I know of is that the 07 engine I dropped in had knock sensors in bosses on the lower block. The older engines may not have these and this may have been a flex-fuel thing. If using an older engine in a newer truck, I would check this. Otherwise, should work fine.