Thanks for your input. I think I may have overestimated my troubleshooting skills!
1) The two main filters are a easily reversible fix, they are still in place.
2) Should I start with Q1 on the 5065 and work my way through or start with the power transistors Q10 - Q13?
3) Should I also be looking at the caps on 5065.
4) With the 3 wires connected to the 5065, I'm measuring about 43mV on the output jack when the amp is on
I've changed the power cable to a 3 pronged because I was getting zapped while unplugging the input jack and holding the chassis (should have taken that as a warning to slow down)