how hard would it be to drop the engine/tranny/kmember as one unit out of the bottom of the car? i have a car that i am scrapping and want to keep these. or would it be easier to pull the engine/tranny as a unit and then pull the k-member? thanks

Not too bad, I understand. You need to disconnect the brake lines and struts, and control the A-arms somehow. Put the engine/transmission/K-member on a dolly, lift the body off.