I had to do it myself and failed.
I replaced the quad can with an Authenticap 30 20 20 20 600v surge and simply recaped the pc with auri audience .1 and .22 mfd also I replaced the selenium with the 1n. The first one I brought up slow and the biased it and all was fine. So I decided to work on the second amp did the same and all again seems fine. I listened to the first amp for about 10 minutes and it sounded very good.
When I finally put everything in its place I lost power to my gz34 and my rear output kt88. Only one 6an8 and one front output kt88 glow. I also replaced the coupling capacitors under the chassis with 47mfd 160v properly.
Please lend me any advice I triple checked my wiring and connections. Best regards Scott