When you adapt the box to your frame, be sure to use plenty of vibration isolation material. Brownies, particularly in OD, have a tendency to be noisy. I used to cut squares of big rig tire sidewall material, and stack up a few layers between the transmission mounting ears and the piece of channel iron we used as a crossmember. Metal-on-metal mounting caused a LOT of noise to be transferred to the frame and cab.
Jerry
