A 5.4 pretty much fell into my lap today. It needs a head and one piston (but I would put in forged rods and pistons). I would take my time and build it myself, then either get all the wiring and everything from a wrecked V8 and put it in my car along with springs and everything else I would need, or just buy a V8 and convert it. I would of course build the 5.4 to make power (aftermarket or ported intake and heads, and cams), however, I am not sure if this the the best way to go as opposed to building my current engine, as far as weight and cost versus the end result (if the 3.8 stays, it WILL have a power adder). The 5.4 I might get will be complete, including engine wiring, sensors, injectors.... A customer of mine is replacing the dead motor with a Ford test motor with about 8 hours on it that we found through a supplier. I don't know much about the Mod motors, and am most worried about the weight (I like my "light" V6), and the final cost when I end up finishing everything. Any help to be given would be awesome, as I have to know if I want it within the next couple of days, or else it goes back as a core. Oh yeah, it is off a 99 F-150 with about 160K miles. It ran great until the incident (he took it to someone else for a tune up to a couple bucks. Oops.). Anyone know how much a Bird weighs with a 5.4 in it? Thanks.