Real? 67 Z28 302 MO

[luv2sixty9]

I purchased this complete short block last week and wanted some opinions on the stampings being real or not. I believe they are real factory stampings but looks like the guy at the GM plant was playing around and stamped it three times with the same Vin number. The block does not look decked and has some pitting and the vertical broaching. It was complete with all original components, i.e. 6764 crankshaft, original camshaft, pistons, rods, oil pump, oil pan with windage tray, timing cover and factory timing chain. The block also has MO and 302 on both sides of the block. Any help would be appreciated. I'm 99 percent sure its real but it never hurts to hear from some knowledgable guys. Stamped V0308MO and casted date looks like B 21 7 or B 27 7.