It will be "in car", your k member however, won't.
When I did it, I raised up the engine, I loosened the k member bolts and let it hang. There wasn't enough room to get the pan out, one of the things preventing this is the oil pickup. Some people have said that you can reach inside and unbolt the oil pickup. If this is true, it seems that it would be more of a hassle than putting a jack under the k member and lowering it. If it were a cork or rubber gasket you might be able to snake it in and under the pickup, but it's not. It's a metal/rubber gasket.