You asked so....
Yes, is the short answer. If there is cavitation pitting on 1 liner, the others have it to. They just have not been damaged to the point of leaking.
Big gamble to do 1 cylinder and not the others. Safe thing is to do all 6 cylinder kits.
Cummins shows an installation tool but we normally used an oak block and a BFH to seat the liners in the block. Every so often we would encounter a liner that drifted upwards before the heads were installed. For them I had an aluminum bar that I had drilled holes in at the correct spacing. I then used shortened head bolts to clamp the liner down until just before setting the cylinder head in place.
Yeah, that was the answer my research returned also.
Doesn't hurt to hope though,right.
Thanks for the installation tip.
Currently I am waiting to hear from another member about an engine that he offered.
As soon as he returns from business we will see what happens.
If all works out, I'll drop in his, then dig into mine as time allows.