Swap k-frame without dropping engine?

Follow-up: decided to go with braces on the inner fender wells; using 4X4's and 2X4's to make a frame and nylon straps to secure the engine. I can send a pic if anyone wants. I think it worked out real well: didn't have to unhook the engine or trans, didn't have a jack underneath the car to get in the way, and it left no marks on the inner fenders. I'm sure the other options work also but this route was best for me. Thanks for all the advice!
Bill