not sure a 2V intake will even seal a 4V port?
the 2V port is low on the intake gasket face and the 4V uses the area above the 2V port as a 'raised' port
IMO much easier to achieve drive-ability through wise camshaft selection rather than re-invent the wheel. there's nothing wrong with the 4V head, maybe the 'friend' needs a Windsor based Mustang EFI 5.0 swap or sell the P & buy a Silver Shadow?
the Edelbrock Air Gap intake matches the 2V port size & location but has a flange large enough to seal on a 4V head, users report fantastic results. simple, bolt on & go
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