My cellar is in a 1850's house with a steep but wide set of walkout steps leading directly outside.A few years ago I built a 261 Chevy engine in the cellar, lowered it off the stand onto a pallet with a Come-a-Long hooked on a main floor beam.Then dragged it up the stairs on soaped planks using our Jeep.
Same way the Egyptians built the pyraminds,only they had slaves to drag heavy objects instead of a Jeep.
My so called shop is an unheated barn 300 feet from the house,too darn cold in there for engine assembly.
The stand is an oldie given to me by a friend,it's very heavy with iron castor wheels,held 4 old inline engines so far.
Adding an extension is a good idea if you suspect the stand is unstable with a long engine.