I have been reading all the threads about the 180 degree thermostat for the 4.7. So I went out and bought the one that was recommended the SUPERSTAT 45358. When I took out the factory thermostat I noticed a few differences. The factory thermostat is longer and it looks like it has some kind of bypass valve on it. I have a 2003 4.7, is there a difference from the 2002 4.7 on this item?