I have a Champion 3 core aluminum radiator. I believe the width and height are the same as a stock 340 radiator. I have a very narrow flex fan and no shroud, no room for a shroud. My fan is only about 3/4 of an inch from the radiator. Close, but not touching. I ran an electric fan system at first but it didn't work as good as this setup and drew lots of power. I am real happy with it now but it took some custom fabbing of spacers to make work.