In one of our old VW Golf rallycars we had a fuel Distributor from a Saab Turbo -78 (I think) It´s a bigger with 6 exits instead of 4. Only 4 of them are drilled and used. I think Porsche is using the same.
The engine was delivering 175 hp on 2 litre. The fuel Distributor was stock, not changed, but we had higher fuel pressure.
This should work out fine for your car as well.