NMS or CNCheads. They seem to be the better heads.

MSD can sort one out if you supply a head although you would have to ask them if they can do it(they sub contract it out to one of their mates. He does a good job but it depends if he is busy and if they will supply without doing a conversion).

My own car is on a big valve NMS head. KE jetronic cannot flow enough fuel for anymore than 11psi on my engine. I am running 14psi held and have to change gear at 5k rpm as it runs lean above that (on a standard turbo!!). I doubt that my car is above 200bhp though as it's only running standard ignition advance.