MN Driver - excellent advice on the oil - but I would still be very inclined to clean that gasoline out of the tank and fuel system. I ruined a 350 V-8 in a 1970 Chevy by letting it sit for over two years. The motor was rebuilt with 30,000 miles on it when I parked it. (I had moved away from my parents house and had it stored in my father's barn). Finally, I came home, went out in Papa's barn, dropped a battery in the old Chevy, poured a little gas in the carburator and it fired right up. I drove around with that old gas for about a week, (it stank real bad). What I noticed was that every time I cranked it up, it would turn over a little slower. I thought it was the battery so grabbed another. Same thing, motor turned over slower and slower. The motor would start and run, but each time it took a little longer and a little longer. Then it started to smoke which it had never done before. Finally, it got to where it would hardly turn fast enough to crank. Turns out the gas had turned to varnish and coated the pistons and cylinder walls of the motor. When I pulled the heads, all the cylinders and piston skirts were covered with a dark brown sticky varnish. That was the end of my 350. And yes, I did change the oil prior to starting it after it had sat for so long. Now, this was 20 years ago so perhaps the gasoline they make today is different from then. But I would sure hate to see what happened to me happen to that super cool '67 Plymouth. Just my humble opinion.