She started showing signs of crankwalk.

Looking back I should kept her and rebuilt the engine, but back then, it wasn't fully understood as to why crankwalk was occuring, and I didn't want to dump money into a new engine and see it happend all over again. It ends up being that the piston oil squirters have a tiny check valves that gum up over time and then they stick open and allow the oil pressure to drop dangerously low at low rpms, which ends causing the crank to eat the thrust bearings.