I have a friend that went from 144 to 146 and it was easy. Like the other two guys said run an eight inch or bigger wheel to take up the slack and order the drivers off the 07 rev race sled(non xp). They went to 2.86 pitch on that year of race sled. I believe they are only about $60 a driver.
I sold my 154 track to a guy who was replacing it with a 151. Sounded like he had no problems with the length. Pretty sure you would have to change the drivers, 2.52 to 2.86