K member removal - engine in car

hold the engine up with a hoist to get the k-frame out and then put blocks of wood under the engine to hold it till you're done. OR...blocks of wood on inner fenders,steel bar-tube-whatever with a hole drilled thru it for a bolt. Put a hook on the engine, lift the engine up so it's off the k-frame and secure it to the bolt.
Probably a piece of chain...or if the hood is off and you have a gantry-type thing-a-ma-jigger,hook a comealong up and lift the engine up a bit. All sorts of ways, be sure to leave yourself enough room under the car and be safe!