1985 Dodge Ramcharger, we can't find the ignition module

I have a 1985 Dodge Ramcharger 4x4 with a 318. We cannot find the ignition module anywhere! We have been told to follow the distributor wires, we have been told that it could be under a piece of rubber near the wheel well, we have been told to look under the washer fluid canister. In short, we have looked everywhere! The problem is that truck isn't firing. We have replaced the coil and still no sparks coming from the plugs or the brand new coil. This is why we need to change the module. Does anyone have any new ideas as to where this part is? We have also been told that if the engine was replaced at anytime, then maybe it's not the same module, but that isn't the problem either because we have replaced the cap and roter and the part was for an 85. It is not in the distributor! Please help, this has become extremely frustrating! Thanks!