O K I very briefly looked over that kit and it is a good kit and engineered well .from what I can see it looks like the chassis should go in front first then the rear . usually when the body is on crooked , there is a part in the wrong place.carefully look at your model to see if you can see the part that is holding up the show, if you can that should give you an idea as to what has to be moved .the final assembly is always the trickiest part of the build because if you made a mistake this is where it will show up. the body to chassis can give even the most talented builders a challenge because often times it requires moving the chassis up down side to side pulling here pushing there sometimes all at once .the best advice is to just work slowly and think about how the parts are going together if it doesn't go one way try the opposite.hope this helps and if you actually waited this long kudos for your patience . keep building and post some pics I always like seeing new work. and by all means keep asking questions.