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I have been working on some Zenith sets form that era and most of the problems have been open resistors.
They seem to be worse than the caps in these years.
After you recap, start by checking your DC voltages just to make sure you dont have a plate resistor thats way off or open.
This radio should do very well.
Ohm out the antenna to make sure its not open somewhere in the coil.
After all thats done check the alignment. Its best to use a signal generator but you can tweak on it a tad and get a feeling if its way off. Mark the screws before turning them.
Most of the radios I see the alignment is right on, the ones that are off are always off so far they hardly work.
You can use an ohm meter to check the tuning cap. Check each section and see if it shorts below 800khz. I have had some of those just slightly bent that are hell to get straightened out
Just some notes form the 20+ of these I have fixed in the past few months.
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