[Arran]

I looked at the schematic for this set, it appears that there are actually two line caps, one situated between each outside leg of the power transformer primary and common negative, so you could only move one to the radio side of the power switch. What I pictured was what you typically see which is one capacitor connected across both legs of the primary or power line. I don't really like this arrangement but it is somewhat safer in that you don't have the power line directly connected across the caps, but is one shorts out it could do some exciting things, this is one case in which I would go the "Safety" cap route . Most of the CGE and RCA sets that I work on don't have a line capacitor, they use an electrostatic shield inside the power transformer instead. Again I don't know what a polarized plug is going to do for you in this case.
Regards
Arran