Hi Dale
I have part number and values for all those locations
But as long as you have a low inductance small shunt capacitor at those
Locations you will be good
Don’t worry about the wheel static arrestor dohikee it’s mostly snake oil for when folks ran out of options chasing down a poor connection someplace that was creating RF noise
The neat thing about iron rust is that in the right situation it can exhibit diode action
So a rusty poor connection can create all sorts of fun for a radio
I’ve personally never needed to resort to weird things.
The capacitor Jon makes is likely perfectly fine to use in all locations
A polypropylene or polyethylene film cap will be so low inductance it will shunt anything in the AM band like it was DC
All those locations are in the 0.1 or so rang so a 0.5 uF is totally the right value and you can’t go too big as long as absolute impedance at 1MHz isn’t compromised.
Modern parts are awesome.
-s