Phildaace

I belive an after market sunroof is the way. I Just cut out a brand new one from a mazda eunos i just sraped and i will be attempting to fit it into an r33 skyline, the only problem i found is the sunroof has a greater arch than the car roof only by 5-10mm but i am not convinced it can be put in this car. It looks like a hollandia 300 but has inalfa wiring. any experts know if i should worry about this gap or can the roof be made to fit.