Many people ask us what's the best way of supporting the car when you're building it. Our answer to this 9 times out of 10 is axle stands (because it's easy to remove them when the car is built), but if you're lucky enough to have access to a 2 post lift (or anything that can lift), then a build trolley is the safest way of building the car.
Here are some dimensions one of our customers has drawn up for us for their build trolley.
Credit @dave@puwermachineryguarding.