Here are some things to consider:
* Distributor cap and rotor: The distributor cap and rotor from the 1992 C-1500 may not fit the 1969 396. You may need to use the distributor cap and rotor from the 1969 engine.
* Spark plug wires: The spark plug wires from the 1992 C-1500 may not be the correct length for the 1969 396. You may need to use spark plug wires that are specifically designed for the 1969 engine.
* Mounting hardware: The mounting hardware for the distributor may be different between the 1992 C-1500 and the 1969 396. You may need to use the mounting hardware from the 1969 engine.
If you are not sure whether the distributor from the 1992 C-1500 will work on the 1969 396, it is best to consult with a qualified mechanic.