Originally Posted by Rzeppa
If the rig is a 1978, that's what it needs (NO CAT!!!).
And they may or may not care if it has EGR. While technically it came on the 78, it may not be necessary to pass. Mainly they will look for the smog pump and whether it has a belt attached.
If it were my rig, I would stick the motor in with just the bare minimum (smog pump) and baseline it before I started adding stuff.
X2. I wouldn't add anything more than what you need to pass emissions.