Revert to Factory Engine Cooling

2 suggestions ;
1 - the radiator should not sit on the radiator support. In fitting other radiators I put a spacer in that could be pulled out later to be sure there is appropriate space.
2 - I'm not sure you have a problem in height - your hood has a seal that goes between the radiator support and the hood. right behind that the frame of the hood has significantly more room for the radiator top, put something on the fender rails to space the hood right on each side and set the hood in place and then climb under neath and see where you are particularly with the radiator cap.

PS I would for sure make the radiator top flat (not tilted).