Most stock amps are quasi-complementary output. We rebuild them full-complementary with White Oak Audio kits and parts.
The newest greatest outputs are available there.
Here's a link.
https://www.whiteoakaudio.com/
Start reading the WOPL (White Oak Phase Linear) Building threads and study the photos.
Read, read, and study the photos. Very few of us resurrect old amps. Most get rebuilt with all new parts except for the transformer and perhaps mechanical meters, or chassis and faceplate. Although Joe (aka "Geppeto", the owner of White Oak and a member here) also offers new superior chassis and faceplates.