'65 Barracuda 273 engine install from underneath body

Bob Jasinski said
My '65 FS is all apart and the body is on casters, now in the shop getting body and paint work done. I'm thinking about the best approach to installing the engine with transmission (4-speed) once the car is back in my shop. Since the K frame is out, and everything else, can I install the engine, trans and K frame as an assembly from below? I have a 2 post lift in my shop and I could bring the body down onto the engine/K frame and bolt it up. That would save risking any damage to the paint by installing through the top. Has anyone done this? Is it better/easier? What issues can I expect?

That's how they were assembled at the factory. That's how they do it in Grave Yard cars. Engine and trans mounted to K member with suspension.
They have stands to support everything and you would need more than one person to watch, balance things. They also assemble rear diff. and
springs first to distribute the weight before installing the engine.