Does anyone have a list of part numbers for everything needed to convert a K5 ('85 in my case) from vac assist to hydro? As far as I understand it, the following parts would be necessary: PS pump (a pump for an '89 K3500 w/ 350 and DRW looks to have the required four ports) - what about bracket and pulley? Pressure and return hose assemblies between pump and hydroboost unit Booster assembly Master cylinder for hydroboost Brake pedal assembly BTW, I'm getting a bit disenchanted w/ the Caddy rear disks - no problems for two years, but lately I'm not so convinced anymore. I'm having a hard time locking up the brakes if I want to (on pavement; neither front nor rear); nothing obvious, no leaks, just had the whole system flushed, pads are o.k., it brakes straight without puling to the side, pedal is reasonably firm and high, but methinks this could be better... and since I'm not getting to do any fun mods this summer, brakes might be a good thing to upgrade... One more consideration, though, before I jump into this: my engine (Q-Jet) likes to die on really steep descents (by that I mean the occasional nose-into-ground steep, not just any hill, my Q-Jet is dialed in fairly well), and I've considered getting one of these little electric vacuum pumps to run in just such a situation and thereby get the vacuum assist back. Going to hydro would remove this option - and upgrade to TBI or Diesel swap (to keep the engine running in such a situation) is not in the immediate future. Anyways, opinions and part number are greatly appreciated, thanks, michael.