I would take my engine someplace to rebuild it for you that way you get a waranty with it. any speck of dirt in any of the oil galleys, or passages, can score bearings, plug oil passages and cause a failure. If you do not measure and make sure your clearances are ok on teardown, then you wont know what they were and have nothing to go buy when you are putting it back together. I mean anything left unmeasured with a clearance that may be off can casue a failure. It is too many things to go wrong if you really do not know what you are fully doing.