This is a topic on my mind a lot. I have a pretty nice stock LX and the AHC works well, but it’s pretty crusty looking under there and I worry that any day I could find my truck sitting on its haunches at the worst time. I’m not sure I agree that AHC trucks would be less desirable in the future. I think a lot of folks would see it as dodging a bullet. I thought about just replacing the rear lines which appears to mean just dropping the fuel tank and just dropping the main muffler and then the infamous access to the top of the rear shocks and the condition of those... makes me think a sawzall lobotomy and installing a quality springs/shocks replacement would actually be an upgrade. Kind of keep my eye out for someone in my area who has real experience to do the replacement.
Not to start an argument, but no AHC conversion kit was necessary with my recent Dobinsons kit installation. Unlike other shocks, the kit comes with the washers and specially designed bushings needed for an LX470 . I'll post pictures in the Dobinsons thread.
Yes, that is kit they sell. If you are converting from AHC, you will need to add on the washer set they sell for an additional $100. After this, you would need to replace the AHC torsion bars with either normal LC100 bars or a stiffer option like OME or Ironman. The stock AHC bars are meant to be used in conjunction with the AHC hydraulic system, and are not strong enough alone to support the front of the vehicle.