1972 340: engine oil smells like gas

So, here is a problem that has been bugging me. My Duster's oil smells like gas. It has been happening over the years and gets to the point that the oil needs changed. I remember a few years ago, I changed the fuel pump to see if it helped but it didn't. The car only gets started and run as I don't have it on the road yet. I rebuilt the Edelbrock carb a little bit ago as the accelerator pump on it went bad. I had just changed the oil and after running the car once, the oil smelled like gas again. Does anyone know what is going on?

Thanks