I recently bought a K1100LT cheap with reasonable mileage just for the engine. I wanted to up the cubes and get 16 valves for my Flying Brick. More grunt required!
This bike has fought me all the way and seems to have plenty left, every nut & bolt is solid.....and check the exhaust manifold.
This is the last basket case K series for me-never again.





I expected broken studs and "only" got 3 stuck in the head in the end.
What I found odd was the further back along the head you get, the condition of the nuts & studs got worse. 
Cyl 1 OK back to cyl 4, no metal where there used to be nuts. 





Sorry about that. I just had to get it off my chest....AARGH.... That's better.

Those pix show an engine in the sorriest state that I could ever imagine!  Must have suffered many, many years of winter's road salt without a bath. 
I must ask.  Did you see the condition of the bike before you committed to its purchase?!

Yes I did but it was "dirt" cheap.

Please excuse the pun.

It definitely was punishing...

Oh,my aching sides!