I have two KZ's in the shop. Hoping for a 3rd one soon. No DFI's... yet.
The two I have 1979, 1980 US KZ's... the 79 I've had since new and is so far from stock I don't care about 'only original once'. I have a hankering to DFI it, but most likely with something newer than OEM stuff.
The 1980 is painfully stock and shall remain as close to true as possible.
Just gotta get the checkbook out and let the dollars fly..