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: Decode casting letters & #'s on Rear 71 BB Redmanf1 Oct 15th, 04, 3:16 AM Can any one tell me what the B stamp the CONV1 or the GM6 stand for? I did look up the casting #. Thanks for any help. http://www.photohost.org/gallery/data/500/958gg2-med.JPG Redmanf1 Oct 17th, 04, 12:44 PM Anyone? Redmanf1 Oct 19th, 04, 4:05 PM Wow Redmanf1 Oct 31st, 04, 9:01 AM Can any one tell me what the B stamp the CONV1 or the GM6 stand for? LeoP Oct 31st, 04, 2:51 PM probably something to do with the engine casting plant or shift the block was cast during. | ||