Gas in Engine oil

I just started my basically stock 318 yesterday that i rebuilt almost 2 years ago (it took me a while to find a car to stick it in to). this morning i went out and decided to look at the oil on the dip stick just to see how the oil looked, and it had a strong smell of gas. I drained the oil and sure enough there is a half a quart or so of gas sitting on top of the oil. i pulled my new fuel pump and there is definatley oil that has been washed away from the pump arm. im guessng the fuel pump is the problem. any other things i should check?