FYI using the method of pouring antifreeze through thermostat housing.After draining block and exhaust manifolds it took 2 gallons and the neck of the bottle of the third gallon to to top off the 5.7 engine block .The rest of the third gallon was used up on the in coming water line from the out drive and the exhaust manifolds.Plus a 1/2 quart went into fresh water holding tank to winterize fresh water system with no hot water heater.So to winterize 5.7 260 HP.with raw water cooling system it takes 3 gallons.Used Quicksilver blue -100 antifreeze. So screw you Ohio winter I'm read for all your crap.The engine was also fogged and fuel stabilizer put in fuel tank.