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Discussion Starter · #1 ·
Hi
I Need Some Help From Any Pass Y-block User.
I Have A 56 Mercury 312 Engine & I Having Problems With The Original Heads On The Engine. The Casing On The Original Heads Are (ecz-c), Have Found A Set Of Heads But The Casing Is (eck-c). Can Anyone Tell Me What The Differents Is & Are They Inter-changable?
Thanks For Taking Time To Read My Quester. Headache
 
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