Hi Stumog, did you success installing your hydraulic system finally ??
In 80 series you have the PTO port at the transfer case, i found it better than a clutch gear pump or a 12V setup as you can fit from a gear pump to a pressure compensated pump or even load sensing one without worries and at same time keep your aircon. Probably it will be more expensive though. What I like out of this HF2A tansfer case is the 10 bolts mounting PTO compared to HF1A of HZJ that comes with 6 bolts, stronger under heavy loads.
About 1H engines I know there are belt driven kits available, not sure for 1HD where the turbo may faul with the hydraulic pump.
Starcruiser's kit may split logs easier than butter on those specs...I also got a gear clutch pump from Flowfit in the past.