easiest way to detect if parts are occupying an area?

So I have made this car spawning GUI to where multiple players could select a part in workspace through click detector and be able to spawn their car problem is Im trying to figure out the best way to go about detecting if the spot is occupied otherwise you end up with a car jumbled mess My short term solution was to detect if something was in the part using Touched function and just delaying it but that is very inaccurate and has several flaws so basically to sum it what is easiest way to detect if parts are occupying an area