It was free, started easy, and got great compression (175 psi per cylinder), so I didn’t want to bother with rebuilding it. I just kept dumping oil in it for past 2 years, like 1 quart for 3 hours of run time. By this fall it was blowing out every oil seal from the excess crankcase pressure, and the cloud was too much. Finally putting in some new rings, exhaust valves, seals, etc.