It doesn't happen every time, but lately when starting the car in Park it will run roughly (not cold start, but after it'* been driven), like the timing is slightly off. In any other gear, even neutral, idle is perfect. There'* always been a very subtle vibration while in park but all the sudden it got worse. Any ideas?

That seems like exactly what is happening to my car. I have gotten answers like IAC, and vacuum leak. I have not had the time to isolate it though. :(

I'd go with a possible vacuum leak also. Check all the line from the trans vacuum modulator too.

Check any broken mounts. A broken mount can exaggerate an insignificant vibration

I just got the transmission mount replaced while the engine was being rebuilt so it'* not that mount, it might be another though I'm not sure. It only happens rarely and started after I got my car back together.

Try pulling the plugs and inspect them. do they all look alike or is one or two look different. mark each one as to what cylinder it'* from and post pictures.

I just replaced all the plugs a little while ago, so they should be perfect. I've been meaning to replace my leads too, they're OEM and are looking pretty worn out, that might be it.

DidI just hear that right? OEM wires on a 92?

I think it'* time for new wires.

Do I know for a fact they're OEM? No, but I'm told they're very old and need replacing. What about coils, should those ever be replaced?