Not Ranked
I'm not an expert but; C is for 60's, and the 8 is the year-1968. the S means Thunderbird (had 390 and 428, I think). The E is for engine group. The 6059 is a casting number that just tells you it is a block, I don't think they were displacement specific. The B is a "change level", the part has had a design change since it was originally engineered.
Perhaps someone else has a little more knowledge of Ford's numbering system.
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