Any good tips for firing up motor on engine stand?

If youre only gonna run it for a minute,You wont need a fuel supply. Just fill the float bowl.
If youre gonna run it long enough to require a fuel system, then youre also gonna need to fill the cooling system.You may not need a rad but maybe can use a continuous loss system or a big tank.
Be forwarned; without an exhaust system its pretty loud.
It seems like a waste, unless you plan on running multiple engines, over multiple times for multiple reasons. But then you would be operating a business, so just build it right, from the get go.