I tore down the short block this morning. All of the cam lobes were good. The pistons looked OK. Double roller timing chain looked real good. Some of the bearings were showing copper, but the journals looked ok. The main bearings were already .030" over and the rod bearings were .010" over. I don't have a mic, just a dial caliper, so I'll have to wait to see what the machinist says. Hopefully a polish will do. The cylinders were punched once already to either .030" or .040", hard to tell with a dial caliper. There was no heavy ridge at the top, the pistons slid out without too much effort. It is a good casting, extra nickel and tin. Same casting as a Z-28 302, but only machined for a 2 bolt main. With some luck, I can just have it cleaned up, new bearings, rings and gaskets, oil pump, cam and lifters for a good short block. If I can ID the cam and find it fits my needs, I'll try to use it to save some cash.
