Just wonderin'...

Been binge-watching "Graveyard Carz" for a few weeks now, and I really like the way Mark and crew install the motor/trans and K-frame with suspension...from the underneath. Of course, they have the luxury of a four point lift and can lift the car up to eyeball level. I, on the other hand, have a car with no drive train, suspension or K-frame up on 18" extension jackstands; room enough to scoot around on a creeper with ease. Has anyone tried installing the K frame and engine from the bottom without using a lift, or is this a just plain "don't do it" kinda thing? I realize I could probably tilt the nose up some, but this would leave the frame rails rocking on two jack stands (possibly very dangerous?) and then the added weight of K-frame and motor would probably make it front-heavy.
So, question is; has anyone done this, and does it work/not work? If so, how did you go about it? Thanks.