Just to add that most EFi heads are perfect for the larger valves, as there is more material to be able to take away when porting and using bigger valves etc..

Also an EFi head will be worth more money once bigger this and bigger that are fitted as more poeple could use it after your finished.

EFi head can be used with either MFi management or EFi like weber, pectel etc..

HTH
Regards