as you can see in the pictures i notched the upper and lower flanges at the axle center line on the frame rail for the crossmember to set in. i notched the frame rails because the corvette crossmember is 28 1/2" where it sets inthe frame and outside to outside width of the frame is on 28. with the frame notched out it allowed it to flex just enough to slide the crossmember in.i was able to flex the front of the frame rails back in enough to its original position and bolted the front radiator support crossmember back in after cutting it in half to allow room for the rack. the process was actually a little easier than what i thought it was going to be... just took a little head scratching!i also had to c notch the frame for the rack as well
