I'm no expert by any means but I know how to check clearances. So does this guy and he'll help you!
How To Use Plastigage -EricTheCarGuy - YouTube
Let us know what you find and someone will chime in. You'll find out a lot about the engine when you pull the pan. If you find a layer of sludge in the bottom, someone lied to you. If it looks pretty clean, then you'll probably be fine.