Test Run Engine Without Tin, To See If Anything is Leaking Options

[motorvated]

As I'm finishing up the top end rebuild of my 2.0 Liter Type IV engine, I'm starting to plan for test running it out of the car on the ground supported by the engine bar and a tranny on some sort of wooden blocks to keep it off the ground. My question is whether or not it is OK to leave the engine tin off for now so that I can easily see the source of any oil leaks. I already have installed the fan shroud and fan, but these also could be removed easily so I could see leaks coming from the new front main seal, oil pump housing, and oil pressure relief valve housing. No alternator yet installed. I wouldn't be running it very long in this condition, and certainly would not want to overheat it by doing this. Anyone have any experience doing this and/or have any opinions about this? The tin located behind the pushrod tubes is installed and will remain in place. It's the new pushrod tube seals that I'm most worried about leaking. I'll be able to see if the new rear main seal is leaking when I pull the tranny off of it after the test. Leaking valve covers would be obvious too. What do you think?