Toshi,
So one side of the fuselage was not larger than the other side????? I got this kit from the local Osco Drug when it first came out. It taught me two things, 1) how to sand until my elbow fell off, and 2), it was the first model I learned to weather and dry brush on from reading the little tutorial in the instructions.
In thinking I got a bad kit, I bought two more, and both had one side of the fuselage larger than the other. They must have fixed it.
Stay well my friend.