Anyone know what the coolant capacity is on a 2007 SRT8 Charger 6.1 hemi? I am replacing the water pump and completely draining the coolant (removing the drain plugs on both sides of the block). I want to refill it with Evans water-less coolant and its very expensive I don't want to buy more than I really need. Also, does removing both of the block drain plugs completely drain all of the coolant?