Well Dennis - none of that can hurt. I was just wondering whether the noise was there with the engine running and only AM station tuned. Filter capacitors are just that - filters to remove minuscule changes in voltage up to radical changes. Smoothing everything out. Noisy tube radios are usually a result of these no longer doing their job. With the engine off, the battery voltage it pretty stable and there would not be anything happening to induce noise.
Let us know what happens with the new bits.
Bookmarks