Why not use the 3.0 heads to start with? They already have the big valves.
The 3.0 heads that have been gently ported with the SVT cams seems the sensable way to go.
Does anyone know the port diameter on the 3L?? SVT ports are 34mm with a 31mm valve seat opening & 32mm valves..To me (a non expert) that and would seem big enough to get full bang from 35mm 3L valves (since the valve seat opening is probably about 34mm)...
If the 3L ports are 34mm then the better flowing surface Extrude Honing would make SVT ports the better choice. AND although you have to remove some metal from the combustion chamber, you can give your compression a boost say 10.5 to 11 to 1.
