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A friend of mine told me that some Magnum 5.9 blocks are worth more, depending on the casting number. If that's true, which casting numbers are worth more and why? I did a Google search and found nothing...
Well on the one side it has a letter and then a "6", but I don't know what the letter is, I have to clean it off some. It's on the right hand side, I'll see if I can get it cleaned off and maybe a picture posted here.