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I have a 66 Chevelle SS and am trying to find out if the engine is the original one that came with the car. On the trim tag the info is 66-13817, the build date is 12B. First of all is that 2nd week of 65 or 66? Now for the engine....The block date is a307 with casting #3902406. I think that the block is a 67 396 but I just want to be sure. Another problem is the the block must have been decked because on the engine ID pad there are no numbers or suffix code. The heads I believe are correct because they are dated L15, casting #3872702.
Any help would be apprecitated, thanks.....Eric Scharf
Any help would be apprecitated, thanks.....Eric Scharf