Factory fan with a good clutch is going to pull way more air than any e-fan setup. It's reliable and robust. Since you emphasized a reliable 30 year old daily driver, my advice is based on the best outcome to achieve that.
Converting to efan is fine if you'd line. My car cools fine in traffic with one, but if your reason for doing so is more airflow, than that's the wrong assumption about the upgrade.
If you are overheating in traffic then the issue is either airflow through the radiator, or coolant flow through the radiator. If you open the cap and siphon out some coolant, you can get a clear view of the internal fins. Are they clogged up with calcium deposits, or clear?
Now the outside of the radiator. Are the fins all bent and clogged with bugs?
Finally the fan. With the engine off, grab it and spin. It should have resistance and stop as soon as you let go. It should not be frozen in place. It also shouldn't freewheel or have light resistance.