Thanks to bdunham7's generous T1 transformer, the transplant was performed, and another 8000A is back in action!
While the meter works, all the readings are slightly off, so I performed a full calibration today. For those who plan to calibrate the 8000A, the hardest part is the period adjustment (the first step). It requires 100ms +/- 5us for the "positive waveform", which really is the "more positive part of the waveform". The waveform is an unsymmetrical square wave, the lower edge is at about 1.2V, the upper edge is 5.7V with ripples. What they want you to adjust is the duration of the upper square wave, mine was about 102.87ms. Most scopes do not have enough precision or accuracy for the adjustment, I use the time interval measurement of my counter driven off of the lab master GPSDO amp, which offers much better resolution and accuracy. I set it up to trigger to start at the rising edge at 2V, and ending at the falling edge at 2V.
After that, it is the routine adjustment for each function using a calibrator. In my case, each pot required tweaking. But when it is done, the meter was working well within spec.
Note this meter is one of the earlier design, using the 14-segment vs. 9-segment LEDs in my other later 8000A along with a zeroing pot. A nice addition to the lab.
Again, a big shout out to bdunham7 for helping me out with the transformer, and bringing another vintage Fluke back to full working order. Thank you!