I put one of those in my 1970, I purchased mine on ebay from a vendor (looks identical to yours) and used there 90 degree angle brackets. I welded them to the sides of the rad and bolted it up to the car. Super Simple job! The brackets i used also matched the radiator and gave it a real clean look. I will see if I can find those brackets and post a pic as well....Hang on..BRB
Aaron
