FWIW I spent some time fitting my SiFab rad. There wasn't much clearance to be had each side between inner wings and positioning the cross bar support bracket was critical. Instructions suggested the bracket should face to rear of bar but this simply wouldn't have worked on my car. Another variable was whether the bracket weld to bar was above or below cross bar which varied it's relative height slightly. It took a while as to achieve best choice (lower position) required end to end reversal of cross bar. This allowed no preload strain on bobbin of top mount despite side brackets positioning rad as high as possible (to give best ground clearance), whilst also allowing some clearance with inner wings, something of a balancing act. The care was justified though as 15,000 miles later no chaffing of rad sides seen suggesting it doesn't move that much.
