Ok so my problem was the length between the rear wheel well and bumper. The dually has the long bed and the model is a short bed and the added length is on both ends of the bed. I added too much to front and trimmed that down but now it is time to do the rear.
Stock model:
Some hours with sewing thread and....
Here is where I have scaled to now:
Does this look good? It is to scale, but it seems like I won't have quite enough room for the dually fender before taillight. Also it might be hard to tell from the pics, but all the body lines are out of alignment now. Not to mention even when I do get it back together I will cut the taillights out! LOL This is turning into a huge PIA.
Thanks for looking.