I had Rusty build mine and it is absolutely perfect. Rusty is the son btw who runs the Havasu location, Dad runs the Chino location. Mine was snug too, but it eventually went in. I referred a friend there who runs the 8.60 class and he was more than thrilled with the end product.
They do a lot of stuff for all those crazy overpowered diesel trucks. Their shop in Chino is a huge wareouse facility, not some little hole in the wall.
All in all I would highly recommend them.