[cobrasnake]

I will post when I get a firm answer - the O.D. of the metal spacer pipe is 1.5" and the outlet from the radiator is 2.0" O.D. #21202 is 1.5 x 1.75" so that will be too small. #20910 is 1.5 x 2.0" so that seems to be the one that will be best, but also harder to find. Thanks - Tom