Welcome to the forum.
As JB mentioned, a lower temperature fan switch would be the best solution to controlling temperature at low speed. The stock fan threshold is actually 235F though, not 220. It definitely waits longer than I'm comfortable with - on my car the gauge was touching red by the time the fan would come on. I don't like to wait that long to find out if it's going to cool off.
The fan switch not only controls the radiator fan, it also controls a fan in the trunk which blows air over the ignition coil and the alternator. It blows through the 2 pipes coming off the trunk wall. (Not all models have this, but I assume from your username you have an 86GT) Unfortunately it does not blow air over the ignition control module, but a generally cooler engine compartment will still help that regardless.
By the way, if this car is new to you, then try flipping on the A/C, make sure the fan immediately comes on at that point. A/C should always activate the radiator and trunk fans, regardless of temperature.
I'd recommend a switch that comes on at 210F, off at 200F. This matches up well with the stock thermostat. Fiero Store might have them, and Rodney Dickman's site does. In the meantime, if your car has AC you can always use the AC switch to force the fan to run. If this doesn't cool it off, then you have other problems.
One suggestion: A more descriptive thread title can help bring in people who know something about the topic.
Try posting a picture of the bumper issue, and change the title if you can. If you can't change it, you might want to post the bumper picture as a new thread, with a title that describes the issue.
For posting pictures, I think the preferred method is to use the "Pennock's Image Poster" link at the bottom of the page. I'll admit I've never used it myself though. You can also use an external host. That's not as ideal because externally hosted pictures eventually disappear.