No kidding. I've been trying to locate one for a while in my area. Closest I came was a guy that wanted $500 for everything and it had a knocking rod. I let him keep it.The early Lightnings did NOT get roller cams. They did use the F4TE roller blocks though. Every other truck/Bronco with the F4TE 5.8 had a roller cam.
I have an F4TE that someone rebuilt and then promptly put a hole in one piston and cracked the cylinder. Sooner or later I'll find another block. If I stumble across a complete 5.8 upper intake too, I might consider swapping it all into my 5.0 pickup. Maybe.
I don't know what everyone's doing with all the used/junked F4TE's, but they are suprisingly hard to find at a reasonable price around here.