Well, I replaced the stupid IAC. Piece of cake, two bolts, ten minutes.

Now, the truck doesn't idle for crap. Let me rephrase that, it idles high, and acts like the clutch position sensor is out of whack. Like if you are trying to merge onto the highway, give it gas, step on the clutch, remove foot from gas pedal, the thing will rev itself to like 3K rpm's.

High idle in all conditions.

Is there a common check list or diagnostic posted some where for this?
And, since the truck is an 88, it is an OBD I, right? Where is the diagnostic port located?