I have a 1966 3 speed with overdrive in my chevelle wagon, after droping a small block in it, I can't get the overdrive to work. All wires are hooked up. The wire that was connected to the (-)side of coil is now connected to an acc. term. at fuse box. The switch that was mounted to the carb. is no longer mounted. I tried plugging it in (but not mounted to linkige) but still not working. The trans. free wheels when you let off the throttle and the overdrive lever is pushed in. I need somebody with some knowlege on these old trannys. Thanks in advance