The machinist who is rebuilding my engine would prefer to bore the liners "in place" rather than removing/replacing them since the liners have been well-seated in the block for many years. Thus I am just assuming that I need to stay in the 83 mm range, maybe that is a poor assumption on my part. (have not reached that point in the rebuild yet).
I cant imagine any experienced builder of these motors wanting to take that route unless the liners can be cleaned up with minimal honing (rigid clyinder hone) and original or new original size pistons can be used with new rings.
Even if you bore the liners oversize,and 83mm is available oversize, you still need pistons,pins and rings
The removable liners are of great benefit for rebuild ease .
Also hes not just boring but then finish honing,checking fit, and at what cost.
I would get best set of 86 mm ,disassemble to check clearances,wash everything with solvent,then soap and water,oil up, reassemble and install.
And I dont like three piece oil rings but thats another subject.
Tom