like sled rocks said, the 03 and 04 have similiar but different front part of the boards the 04 has 2 big square holes up front in the footwells and the 03 doesn`t but the crappy wrecktangle slots all the way back appear to be the same.
When I purchased my snow eliminators they were made to the 03 sled and when I put them on my 04 sled the front of the inserts were comverint the 2 front bigger holes like blocking them off I didnt like that so where the eliminator have 3 square clearance holes apiece cut in them to clear the crease like dimples made in the tunnel on each side just in the bend to the vertical tunnel sides to the horizontal running boards that I moved the eliminator back so the front of them were just behind the 2 bigger front holes and then cut 3 more of my own square releive holes to clear the dimples mentioned and that worked great and also help with snow elimination even farther back on the boards.
Snow Eliminators are by far the most inexpensive priced inserts and work awesome and strengthen the board enough also I have over 3 years on them
I swapped out chassis`s last year and happen to be an 03 chassis so no more front bigger holes, I havent cut them back in yet.
Here are the releif holes I put in but got a bit wild with the grinding bit, also they ahave been powdercoated.
Wildcard