Just got mine together yesterday. You need to change the the little piece on the carb where it connects to the linkage. You need ball connecter style. Tower has them. Also had to make new pipe hanger. The stock header pipe sticks out further than the 18TM pipe. Just repositioned the pipe with new hanger. IMO the os engine is much easier to deal with than the 2.5 or 3.3. (IMO) It is much faster than the 2.5. Can't really hold it wide open for long, I can't see it that far away. I went to a big church field that runs along the road. It sure is fun out running cars on the road.