Nice mod. The AMT kit represents an early T600B, around 1994. The main issue with the kit is it still used the old, early early 1970s W900 kit frame, which was not a set back axle configuration as the T600 represents. Everything under the kit hood was wrong. However, it was a welcomed kit from AMT since they had not issued any new (American) truck subjects since the late 1970s, and have not since. Beggars can't be choosy!