Here are some pictures. I think the head from the rallye will fit but 100% sure. If so u will get about 110hp i think. But u will need a remap too. I only changed the inlet and throttlebody.
Here is the plug u have to get from the Rallye wiring loom. And it has to be made a bit longer and change the wires. The yellow is in the middle on the rallye throttlebody.

I turned the stepmotor around to avoid cutting the wires. the plug fits the stepmotor from the rallye. The yellow plug is a heater I think. works ok without this plugged in. The two vacum holes next to the stepmotor has to be blinded in some way. I just did like u see in the picture

Here u have the two small vacum pipes. I used one for the pipe from the gastank and the other for the map sensor.

Here it is finished