Maibach Tractor 800-808-9934 stocks everything you need to overhaul a 60 engine. I just ordered a set of sleeves and pistons(includes rings, pins, keepers, o-rings 3 3/8 overborebore) yesterday. The prices they quoted me are $635 for the sleeve set, $138 for main bearings, $62 for rod bearings, $16.09 for the cam bushing, $190 for a complete gasket set, oil pump vanes $42.85 X2, and $ 2.53 for the vane spring. An expensive little motor to go through.