ummm if you still have the carby ignition/electrical loom I'd be ditching it and using an EVO loom which is suited to the 4G63 as the GL carby loom isnt.
Gianni, to save yourself the hassle and headache and getting back on the forum and posting several questions to try and get people to help diagnose electrical problems when things dont work, please get your hands on the same looms from the same car if possible. That's #1 priority. We've seen it happen many times mate therefore trying to give you guidance up front is the best preventative measure
Therefore if you have an EVO III GSR engine loom and ECU, see if you can track down an EVO III GSR electrical loom and interior loom before you start pulling it all apart. If you cant get EVO III, use EVO II next, then EVO I, then GSR. Mix and matching looms isnt going to work 100% and you'll have to sort a few items out. GSR looms still require some adjustment to suit a 4G63.
Again, my recommendation is NOT to commence doing the conversion until you have all EVO I-III looms. EVO interior loom will guarantee your cluster and tacho will work. Also a reminder that your power mirrors will be different for EVO fold-in items. You then need to get both EVO door looms, or make up some extra wiring from GSR front door looms (Evo has 5 wires to control power mirrors and fold-in capability; GSR only has 3 wires to control movement of the power mirrors). Then you've got things like the climate control, fan boxes, ignition barrel alarm, engine control relay, battery terminals, cat converter temp sensor, dash temperature sensor, fuel pump, radiator fan, aircon, Y-connector for the EVO III fog lights, starter motor and more. Depending on what you use you can turn an easy job into a difficult one. Keep it all EVO III or EVO II then go to EVO I as a last resort, then do your conversion
PS: Take it from an old hand who has done many conversions to date in coupes, wagons, sedans, GSRs and Protons using different 4G63T/4G93T/4G93P/4G93 engines from VR4/EVO/RVR/GSR/Proton GTi/GLXi and different looms. The most recent is Chase's EVO engine conversion into his GLXi coupe about 3 weeks ago. We also changed it from Automatic to manual transmission. I did all the wiring and although there was a hiccup at first putting it together with a bouncing relay, it was tracked down to a bad earth and sorted quickly, then the car started first go.