Yep, I have the HD Field Trax on my 425 AWS, and I like them.
The two issues that you will run into are that without a spacer the wheels will rub on the steering arms. Second is with the 54" deck, the left rear deck wheel will interfere with the left rear tire when the deck is over half way up and you are turning to the right.
Now using the 1" spacers that will bring the wheels out a little further and create more interference with the left read deck wheel. You should be fine on the right hand side. The easy way to deal with the left rear deck wheel is to remove the bolt and move it to the other side of the wheel bracket.
-Dave