Hey, thanks for the reply. I did run some mid-level fuel treatment through it and I did run it on the freeway pretty open. Cleaned out all of the little bugs--but I still got that rough idle. I do, however think you may be on to something with the carburetor--where is that part located? Also, if I have a leaky head gasket, won't I have a sweet smelling white smog? or maybe the engine running hot? I don't think its internal cause the car runs beautifully--just idles like crap.