209K miles (if the dash is original. 5 speed swap wasnít done by me and the dash has definitely been tampered with to cover up the PRND lights)
Got home and looked down the carb to see solid streams of fuel going down both barrels. Looked to me like the float was stuck up and fuel pressure was just shoving fuel straight through the carb. Just pulled off the top hat and cleaned quite a bit of dirt from the bowl. Been using non ethanol gas to clean things out so I expected a mess in there. Everything looked normal and operated freely (no sticking, just smooth movement and no fuel inside the float). Only now, with everything put back together, it idles rough but I donít see the streams of fuel going into the carb. So that leads me to believe it is running rich only on the idle circuit, but I am unsure what to do about that. Iíve read that the mixture screw is blocked off from the factory as it isnít necessary to adjust. What could be causing a rich idle circuit? My only thoughts are possibly an old gasket but I donít know which gasket would affect only the idle circuit. The top hat gasket looked to be sealing everywhere just fine, and I cleaned off the mating surface on the carb body.
Car drives down the road beautifully, no hiccups at all. Just idles like crap and stinks up the cat. Idles better if I create a vacuum leak, but that just increases RPM rather than smooth the idle (confirming for me that it is getting too much fuel at idle). Don't know how to check the idle circuit system but I'll keep looking