Lets See Your Big Block Test Stand

I've thought about doing this myself but, I just use my car's engine bay. It takes up less storage space and by the time I fabbed-up something, the materials and time weren't worth it for me.

Right, that's where I'm at. If I'm going to 'test' it, why stop at leaks? May as well go to dyno or just drop it on the mounts in the car. I think the biggest reason for me is the space it uses.
For me the run stand makes the most sense when you’re building something for someone else and they don’t want to pay to dyno it. It lets me control the first start (and cam break in if FT) and gives them a chance to see and hear the engine before they take it. Kinda releases the builder of responsibility when the owner inevitably screws something up putting it in the car.