 The baseline Saturn MLV would incorporate these changes from the Saturn V vehicle.Saturn IC (first stage) stretched 240 inches with 5.6 million pounds propellant and five new F-1A engines; 
S-II (second stage) stretched 41 inches with 1.0 million pounds propellant and five J-2 engines; 
S-IVB (third stage) strengthened, but with standard 230,000 lbs propellant, one J-2 engine.