Almost everything should be correct. Trailer width, length, frame thickness, cross member placement, tongue length and width, wheel location, deck height (top and bottom), and about any other measurement you will need. The wheel style is not correct and there are a couple cosmetic differences, but all important dimensions should be dead on.
This model has been a big help to me in my design and I hope it does the same for some of you. Enjoy!
Cheers,
Ryan
P.S. You will need a program called SketchUp in order to view/modify this model. As long as you are using it for personal use you can download it for free here: http://sketchup.com/download.