Another IMS thread. Recently installed the Dobinsons IMS on our 18 LC. The ride is great and much better than stock, but when I went with the 59-542 on the front and 59-559V I ended up with slightly more rake to the front than wanted. With 285/70/17 the measurement were FL 37.25 FR 37.0 RL 39.75 RR 39.9. After doing some research and asking around here Dobinson remade the 59-559V to retain the factory rake for US trucks when lifted. I emailed about the 59-543 to see if i could order them, but was 5 months out and coming from Australia I didn't want to go that route if it didn't work. I just got the OME 2721 spring in and installed it and brought the rear down to 38.5 and 38.25 a perfect 1 inch difference and no more nose diving. Overall the IMS is perfect for what I wanted and now sits perfect.