Zenith porthole dudes - help please

[ShartZenith]

You Zenith Porthole dudes (CW Moser, Noisebox and whomever else wants to chime in). Bob and I are on the final glidepath (we hope!) of restoring the chassis on my Zenith Tennyson 24H21. We're wanting to replace the important resistors that we've read and heard about to prevent any problems. We've also heard these specific resistors are 100 ohms and are connected to the cathode side of the power tubes. If this isn't correct please help us with your expert guidance. Also, what wattage should these resistors be when we go to buy them?
Thank you! Steve and Bob