I was looking to get another 3500 CTD today and when I looked underneath them they were all 53 blocks. I looked at a 1999, 2000 and 2001, all duallys. Even with a warranty I couldnt get myself to do it. I came home tonight and thought I havent seen a good 53 thread lately and low and behold there it was "99 and 53 block questions". I saw something that dropped my jaw, Cummins will now only pay $1000 towards the replacement of the block as compared to 50% or $4500 of the cost. He quoted Ken Scobel at Cummins Main. My 53 cracked in October of 2003 and I guess I was fortunate to have Ken pay half.