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Boss looks to have E possibly D assembled 7-25 ?

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That,s a D with a divot in the middle......

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I don't know


But remember this , 69 model year assembly was schedule to start on 8/1/68 , this engine was assembled 6 days before that.

I imagine that 68 model year production had already stopped, the only reason it would be a D is because the guy stamping it goofed, and it may have an E stamped over the D????

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At regular scale, it looks like an E. However, if you blow it up, you can definitely see curves on both the top and bottom. That seals the deal for me.......

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