Purchased 1973 duster a few weeks ago need help

If your bellhousing is like mine then oil can definitely make its way onto the clutch and that not something you want to happen. Fix the leak now. It's an easy job if it's the sending unit at the back. If oil is leaking onto your clutch then that might cause some chatter while taking off. Worst case scenario you pull the trans and have a look at the clutch.