51 ashton, Thats a good idea. Does the petcock hole sit at the botton of the water compartment? We didnt flush it but we just kept flushing back and forth for awhile with it tilted back to the freeze plug hole. I will pull the petcock out tomorrow and flush again and see how much we left.

Working on a 1949 Chevrolet 3100 3 window with a 58 235.

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