Cranks are a machine-shop or junkyard item (virtually all small-journal 327 cranks are forged), '67-up small-journal rods are plentiful at machine shops (don't use '66 and earlier rods - they're weak), Speed-Pro/Federal-Mogul has pistons and bearings, and Speed-Pro/Federal-Mogul and Crane have the cam. Also lots of aftermarket sources for better rods (Crower, Howard Cams, and others); I'd spend some extra money on really good rods and have a bulletproof bottom end.