3.5 vs 4.6 head design

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not a lot ,carb heads and efi heads differ in that efi have a notch in inlet ports,also check thickness of head as a head used with a composite gasket rather than steel is in effect lifting valve away from cam and hyd tappets need to be within their tolerances
 
Yes what Noreseman say's.

not that the outer bolts are needed, they unevenly load the head and allow a slight gasket leak into the valley..

I personally torque them to 25lb/ft and do the "normal" for the other bolts.
 
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