I need to replace the top and bottom hoses as well as replace antifreeze as 8 years old on my 1974 TR6. I have reviewed the website and this is my plan: 1. Get the engine hot (heater on and set to maximum) until thermostat is open, and leave for a few minutes to fully circulate. 2. Remove radiator cap, remove bottom radiator hose, and top hose and replace new hoses. 3. Remove cylinder drain plug, check water drains out, but if not "poke around" with a coat hanger/screwdriver to un