I purchased a new radiator for the 63 impala I am building. Purchased it from classic industries, notched aluminum for use with a 500 steering box. The problem is it does not mount to the radiator shroud. The mounting distance between the bolt with the original support is 27 inches. The mounting centers on the radiator are 27 1/2 inches. Has any one else run into this problem. I am afraid of increasing the notches on the radiator as it will be too close to the side tanks. The box it came in was from OER repro parts.