The car thing isn't a bad idea at all.
If you spot zip ties, duct tape, plastic garbage bags, bleach, and a shovel in a car...
You might want to be significantly careful. Let's put it this way - let someone else tell the applicant they are NOT hired.
As far as 1987 930 goes, I would take a good look at that car. Any 25 year old car that is (as I assume yours is) in excellent condition tells me that the candidate appreciates fine machinery and is capable of maintaining it to a high standard. Would probably take good care of any company car I gave him. If the candidate's car looks like it was driven in a destruction derby by Helen Keller, well - that person might increase my insurance/risk exposure...
angela