The only trouble you may have is if the transistors are direct coupled in the
power amp. I would do one channel at a time & be sure every thing runs cool.
To look them up replace the K with a 2 & you got the Japan ##
The transistors are Korean, Scott labeled korean stuff in the "Quad" era. . IIRC
the last few real Scotties were quads & still built in Maynard Mass. The factory was 5 miles from my old house.
Zeno