[cokefirst]

Actually, 1956 was a transition year, the late 1956 Thunderbirds had the cooler lines, and the early ones did not. The 56 F100 had a complicated cooler that did not use the bottom of the radiator yet had a fitting that went into the radiator hoses. You can see it in the parts book. I am not sure if the late passenger cars had the water cooled transmission in late 1956 but I suspect that they do.