The OP doesn't state which engine he has.
Also, as much as I love staring at Keith's immaculate engine, it's not a good representation of factory, since it's been Nuttered, has an upgraded ignition, and is much tidier than OEM, overall. If the OP is truly shooting for an original restore, he will need pics of an unmolested engine, complete with air pump, EGR, idle solenoid, etc, etc....
Here's what my completely original '81 258 looked like when I pulled her out of the barn after a 6 year storage. Unfortunately, this is the only pic I have.