Here is a 383 standard bore block, crank, rods, pistons. Date code is July 28, 1970 if I’m decoding it correctly. According to my cheap WalMart micrometer it is standard bore. The crank is a 400 crank but is a forged crank. I see no cracks or damage but has not been professionally checked.

www.facebook.com/marketplace/item/1115558476422159

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Master, again and still