My dad bought a Chevy block from someone and he is curious about a brass plate located on front of the block. He has decoded the block to a 66 to 67 Chevy 283 Nova, recessed oil filter. The plate has R26A stamped in it. We did some internet research and are unable to find out what this plate means. Does anyone know? Please respond either on here or to [email protected]. Thanks guys!!!! Happy Holidays!