Yea, i bought a full gsr a/c unit from another member thinking it can be used in my ek. But now i have people telling me that I would have to use my stock a/c that this car came wiht with del sol bracket. it this true?

I dont have the a/c unit or anything that came with the hatch to make a/c work. so i wanted to know the gsr a/c parts i bought will or wont work?