I have two of them. I assume you got the PS with it. If not, that item will be very difficult to find.
The main thing to remember about the 2KL, is drive power. Just 35 watts is all it needs on 75, and perhaps 40 on 10 meters. And.... and it is a big and, you HAVE TO USE the ALC as it is part of the protection circuitry. Leave it disconnected and I'll almost guarantee you'll blow a final, and they are not cheap!
The one I use has been in service since 1979, and has never hiccuped. The spare is still in factory boxes, just in case.
PS: I have board layouts, schematics, and manual. Their former two are large enough that they can't be scanned.