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Jake Wade · 09-15-2016, 07:21 AM

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

09-15-2016, 07:21 AM	#2
Jake Wade Registered User 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