it's hard to make a guess here. personally, i would rebuild if you want it to last. if you rebuild, milage isn't really an issue. if you don't rebuild, milage can be a nonexistant to huge issue depending on whether it was abused or not. some engines last well over 200k, some only last 35k. if you have the money, rebuild it for sure. shortcuts tend to cost more in the long run, afterall. good luck!