8 3/4 center chunk ?
To the best of my knowledge, there is no casting dates on 8 3/4 centers.
Different years for "741", "742" and "849", but no specific dates, that I'm aware of.
http://www.mymopar.com/Mopar8_75RearEndGuide.htm
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http://www.mopar1.us/875.html
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Hope this helps.
Giles
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