Would reducing the bottom outlet on a radiator cause any drama’s , the reason I ask is that I have found a way out of my hose issue, and that is to change the bottom outlet on the 250 radiator in the car to a smaller diameter as per original 221 design, that way I can use the right hose for the job that will fit the water pump outlet correctly , It will be going from a 45mm diameter outlet to a 35mm diameter outlet.