225 Slant Six Oil Smells like gas

I'n not sure about the gas in the oil problem and if the fuel pump would be a cause but I would rent for free from Autozone, Orielly or napa a compression tester, test the headgasket. As far as the fuel pump change, its pretty easy, less than an hour, a couple bolts, a couple lines and youre done. Just make sure you index the fuel arm correctly, when you pull the old one, match the arm of the new one to the position of the old one.