I know that warn only lists the 424 select unit for the 300 prairie but I want one for my 99 400. I think the drive shafts are the same but it is a clearance issue. If someone knows if the 300 vs 400 drive shafts are identical or have put the 424 in a 400 let me know. I figure I can move the rad or make room for the unit if it will fit the splines and length. Thanks, Mike