Originally Posted by ramfam
Gms have a spark control modual in distributor that takes the place of vac advance. Wonder if that's TSB . I didn't think magnums had that.
The Magnum 3.9/5.2/5.9 has a cam angle sensor in the distributor (sometimes referred to a pick up coil or hall effect sensor).
The older 3.9/5.2/5.9 engines (pre '02, IIRC) had an issue with the cam angle target coming loose inside the distributor, and hitting the sensor, and causing erratic driveability. The OP may wish to investigate that.
The TBS was only informational for the spark plug wire routing.