65 Barracuda daily driver

the easiest way to drain coolant below your water pump holes in the block is with a bit of tissue. twist it into a straight length, poke one end into the coolant in the block and 'bend' it down in and out of the hole. you will see coolant 'wicking' down the tissue and then dripping from the end of it. the level will drop below the bottom of the hole.
neil.
ps the idea came from being shown as a child a shrimp/prawn hooked over the edge of a glass of water. with the tail in the water the shrimp/prawn appears to be dribbling down the outside of the glass.