Generally the best solution is to have YOUR engine overhauled to new standards, were ever you send it. My plane has the engine it was born with, and has 100% of the logs from birth. A factory reman with 0 time log book, means you get a mishmash of parts from a variety of engines; crank case from one engine, crankshaft from another, etc. The reason it's a 0 time engine is no one knows the time in service of the core parts used. Want a case with 7000hrs or a crank the measured OK that was involved in a prop strike? Who knows what you get.