I have done this on both systems (the 240's in my signature line) but not recently.
I do recall they are very similar. The K-Jet was no more difficult than the LH.
Except the rubber boot on the K-Jet can be a pain to get back on correctly. There is a trick but I don't remember what it is at the moment.*
The only other thing that comes to mind is one of the three nuts for the throttle body is a bit tedious. The one to the inside, I believe. I think I used a box end and could only turn it about 1/8 turn at a time.
Take notes. Take a picture. Draw a diagram. Whatever. There's not that much stuff to disconnect/reconnect.
Use a new gasket, obviously.
When I did the K-Jet car the cleaning consisted of no more than wiping it with a rag and some carb cleaner. It was just a slight film of carbon that probably was not affecting anything for the worse.
The LH car had a lot more miles on it and there was definitely a gunky, crusty build up. I forget what solvent I used but it cleaned up fairly easily.
* Edit
A post from 2003 by one of the better minds from the old days, Don Foster.
https://www.brickboard.com/RWD/volvo/682558/220/240/260/280/always_struggled_installation_whats_trick_nmi.html
Notice who asked about it.
It may not be as easy as it sounds but I believe it works. Be careful not to tear the boot at the seam.
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'80 DL 2 door, '89 DL Wagon, '15 XC70 T6
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