Coolant Flush help
 

so I'm going to flush it out. open petcock on radiator and let it drain. I'm going to add the prestone flush, run the motor for 10 minutes to let it all circulate. Drain that from radiator. Fill with distilled water, run motor again to get it all clean. Once I have it all out, I know I need a 50/50 mix in there. How much water is going to be left in the system after I drain the radiator for the final time? Cooling capacity is 14 quarts? So basically I just dump in 7 quarts of straight antifreeze and then from there on use water until it's full? I was just concerned on how much water is still left in the system/around the block after the drain.

Also..how do you BLEED the system? I read that was important.