Thread: mark IV 454 1983
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03-20-2008 07:44 AM #1
From the Mortec site..
346236.....454.......75-76...2-bolt
What is he casting on your Heads-I believe you are giving us your Block Casting #'s
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03-20-2008 07:54 AM #2
Those heads should be '75-'87 oval port open 120cc chambers, 225/116 ports.
Cheers, Mark






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