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Old 09-15-2016, 07:21 AM   #2
Jake Wade
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Join Date: Aug 2005
Location: Louisiana
Posts: 711
Re: Conflicting info on Rear Mail Seal.....

Your 454 has the 2 pc rear main seal. The SBC got the 1 pc seal in '86.

The 454 mark IV block with the 2 pc seal ran through at least '95
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