In 1990, I put in a set of new pistons, rings and liners. Make sure the bores are honed. In 2007 with 94,000 miles driven since 1990, I had the bores rehoned and installed new piston rings (plus all the other items normally changed). At that re-build, I measured less than a thou (0.001") of wear in the bores - probably "out of round" due to wear caused on the inner sides due to piston slap. So I turned the liners 90 degrees so there would be no wear where the piston will slap for the next 100,000 miles (or more). I'll be 98 by then and probably won't care much (or remember much!).
Don Elliott, Original Owner, 1958 TR3A, TS 27489 LO