I need to get with the times and learn efi voodoo.I was actually successful in getting the car to idle down to 650 rpm steady (albeit with a small hunt) it's all about afr and timing... lower idle pulls less vacuum so you need more timing to bring the vacuum signal up, this causes it's own issue however because then you must restrict the air charge more (less throttle) and this causes the car to hunt as the iac fights hard against the vacuum pulses..... I settled on an 775 rpm idle so when I load the engine (electric loads and ps load) at idle I don't get a drop in rpm. Blah blah blah lala LA LA LA LA LA blah blah.... tuning voodoo black magic chicken bone.