Thanks again to everyone who has provided information regarding my previous Transmission Controlled Spark System questions. After learning more about this system i am now wondering if most people who have retained the T.C.S. have also retained the idle stop solenoid. Did all 70 SS 396ci 350hp cars come equiped with this? Is this a necessary part of the T.C.S. or can the T.C.S. be run without the idle stop solenoid.Is it recommended? The more i learn about this system the more complicated it appears,now i see why most people have removed it. Thanks again,any assistance is appreciated.