I converted mine and besides the fact it was time consuming, it really wasn't that difficult. My mechanical skills are what I would call "average" and, for me, the most frustrating part of the job was the serpentine power steering pump. The pulley put up a damn good fight and there are bolts hidden in places that are stupid-hard to find. I had scrounged around the junkyard and sourced the hoses from an early 80's C30, the brake pedal came from a diesel K5, and found a power steering pump with the correct return port can on a GMT400 Suburban.
Problems I ran into: The hb unit was a $20 gamble from craigslist. Of course it leaked at the pushrod seal, letting fluid drip onto the floor mat. It was replaced with a reman from O'Reillys, which also leaked and had to be replaced with another one. My old power steering pump was installed into the GMT400 can but failed after a few weeks. Two more reman pumps also crapped out in short order which pissed me off enough to buy a new PSC pump. Added an auxiliary fin-type cooler per PSC's recommendation and haven't had any more problems. Been running the hydroboost for about ten years now and it's been trouble free after getting the bugs worked out. I don't think everyone would have the steering pump issues I had. It was probably a combination of so-so quality parts and the fact I do a fair amount of offroad at low speeds with oversize tires.