Considering the amount of labor involved.
It would seem to be more labor intensive to attempt to basically rebuild your engine while still in the vehicle.
Not to mention just honing the cylinders and cleaning it and keeping any debris away from the internals.
Another item to note, I would assume your taking the head to a machine shop to have it checked, if it requires machining etc.
What if the block requires surfacing?
I would suggest you look at some videos on what is involved with a engine removal and compare those to what your attempting to try.