Originally Posted by hindsight2020

10K is def on the high side for a used lycoming O-320/360 crank. 30K is def on the high side for an O320/360 overhaul, unless you're doing all accessories too on a high faluting name-premium shop to new limits. I'm with the gallery on here, on a vintage cherokee (140/180/basically anything fixed gear hershey bar wing), you're better off swapping the motor for another used one or doing a more aggressive shopping for a field overhaul. But your money, your circus. At least you don't have angle valve cylinders like I do. Pricey. I'm an IRAN guy though, I have a lot more risk tolerance to running Lycomings on-condition. To each their own.