Static Oil Leak Checking

There is some merit in your idea. I parked my truck on about a 30 degree incline for about 2 wks. years ago and found a puddle from the rear main that i never saw leak before. But it had about 40k on it at the time.
If your not confident that you got everything right you may want to inquire around and see if someone has a test stand you can rent or use. Should be way cheaper then dyno time.