Thank you so much for your help. I've replaced the op-amps on both pre-amp boards and now the amp works and sounds great, the sound is incredible! I installed 8 pin sockets, used the 4558 and rewired the board in that section. The original filter caps are in place. Do I need to keep it powered on for a few hours to reform the caps or is that unnecessary? Next I want to get the lights in front to work.
Thanks again for your time and advice.