I don't know if this has been covered before, but My M37 distributor gets hot when running the truck slow. Like in a parade for example. On a hot day the coil gets too hot and quits. When I open the hood and let it cool down, it starts and runs again. The coils I have in stock are the chrome Chinese ones. They just don't work when they get hot. So I am wondering if anyone else has had this issue. If so, has anyone ever tried to put a ballast resister in series with the 24 volt lead to the coil? I am thinking that by dropping the voltage to the coil it may run a bit cooler... Or am I just crazy?