The Proline bulldog B4 body works pretty well with very minor trimming. Check out the pictures of my B4 with it and the T4 chassis.

http://www.rctech.net/forum/8573712-post14034.html

You can kind of see where I trimmed it on the front. Also flattened the nose with a heat gun. I left a little extra material around the rear body mount tab to give it more support. There is enough room on the sides to put some velcro at the flat spot but not closer to the front or at the very back. I use velcro on the sides and a body pin on the front.

Steve