I made a cradle for the transmissions out of some scrap lumber so it's not totally on the ground and I can rotate them without getting weight on the connectors and levers
When i was a kid we used a 35gal drum, put a big V on one side and a small v on the other.. would hold a housing perfectly... Whats funny is i probably had built 35 trans when i was like 20-22 and this one has be more stressed than anything on the car, and 727s are cake to build...