Re: 51 Merc v/8 into 40 ford
Back to the engine mods: the truck and Merc heads are low compression, The 8BA is next and the EAB is the heighest CR stock head. This milled for .05-" piston to head clearance cam increase you CR about 1 point. What you must realize is: the factory advertized CR is way off (7.2) in all the years I've been doing this, I've never seen them any where near this.
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