Gas aroma: 67 Plymouth Fury III

My 67 Fury III is pretty stinky. I thought i'd take it to the local muffler shop to see if i have a leak that could be expelling the smell but then i thought i'd do a post here in case you people know of some simple things it could be. The car is basically all original so its greasy; there are oil leaks but nothing horrendous. Any ideas where i should look first?

Thanks.

Author: Rich Good