When I installed the half radiator in my car I had to notch out the bottom radiator support and make new mounts for it. (They are in the wrong location for a Civic radiator.)
The hold down clamps on top also do not line up anymore. I just made the hold down clamp bolt to the fan spot on the new radiator, and then drilled a hole in the radiator support and welded a nut to the bottom so I could mount it.
Modified OEM clamp:
Radiator:
Fresh!
Slim fan mounted on the opposite side.
The
only reason I went half radiator was because of the turbo. I would keep full size if I wasn't running a turbo.