i tried from the top and there is no way to install it with out removing the steering shaft which is a whole other nightmare. if you have your car on jackstands install the header through the body cut out with the 4 hole flange on the floor you have to twist t n place between the 4 inch round tube the foot box and the inner fender panel you will scratch it.
unless you are having a problem with the header hitting the foot box then you have other issues. i have had mine in and out trying to heat it so it fits the car.
mkIII picked up 9-10-04 completed
9-05 445fe stroker 750 quick fuel q series
tremec 3550 irs ffr fuel cell cobra brakes non donor build black no stripes.