I have a 93 5.0 that I fired up for the first time in a long time idled fine for about an HR maybe longer no problem radiator held fluid oil was clean I took it for a 3 mile spin and couldn't make it temp gauge was off the charts and I lost about 2 quarts of coolant into the oil pan. No fluid/ minimal steam coming out of the exhaust but the million dollar question is, is it a cracked block?? Or bad gaskets??? Remember I can physically watch the coolant level drop when hot with no visible leak... Thank u in advance!!!