Electronic ignition issue

A little longer rip today and when I went to shut her down she hinted a little run on. Could this be a timing or fuel adjustment,this engine still has the solenoid for I believe this type of situation and was working ...awhile back.(lots of decayed wiring in this car) but is now appearing not to work.
Thanks 67Dart273,your posts as well as others have been very helpful and as I have said in the past all help is greatly appreciated. Jeff