I agree with Robert. I have learn this the hard way more than once. Always thinking the cooler it runs the better, but there's a limit. I have a 160 in my crate engine stroked 360 (410 cubes). I left the old cop radiator in the car and figured I will need the 160. Nope, never really fully warms up and I live in steamy Florida. I am going to swap it out for a 180 or 190.