Yes; although it would be somewhat like putting a tow hitch on a '58 VW beetle. A Model 467 Arvin isn't exactly suited to the task- it doesn't even have a volume control that acts on the audio stage.
You would have to add the following parts: selector SPDT switch to choose between Aux In and Normal Radio; a potentiometer to adjust the aux input level; some kind of connector (RCA jack?) to accept the aux source; and possibly a 0.05 uF coupling capacitor.
The result would definitely be Lo Fi. But it COULD be done.