Waiiitt you mean like... the actual setup under the hood exactly? That makes sense... your buddy has the OBD2 computer and such under his hood, so there are a few new components. If you look at chevylee's pics, you will see he has a large black "tray" if you will, right on top of his drivers side wheelwell. that is where his OBD2 computer should go, but he must have took it out because he had to make some kind of computer swap/mod to allow the full use of his 6.0L 364. Actually, if you look at his second picture, it looks like he has the computer chip moved over to the passenger side (the thing with the huge wad of wires plugged into it in the bottom left of the picture).... or maybe I am just dumb and the OBD2 computer was moved over to the pas. side in the '97 - '99 models.
We have OBD1 computers that are a lot smaller.. and they are under the driver's side dash somewhere I believe. I'm not positive on the location, I just know they are a lot smaller haha.