Hi Lou, I've never worked on a H, but lookin at the parts book:
1: On the upper main body on the left side is the idle rpm adjustment. Adjust for proper rpm at idle.
2: On the lower left side body, is the idle inrichment screw. Turn for best idle, but if turn all the way in and it makes no difference then the idle circuit is still plugged. Reclean. A preset is 1 turn out from seat.
3: On the lower body bottom a screw running from right to left at a 45 degree angle is the high rpm fule mixture screw. Run engine at 1500rpm and set for best rpm without missing. A preset is usually 1-1/2 turns out from seat. A Rich setting is better. I usually turn to best lean run, then turn rich 1/4 turn. Lean is screw in, rich is out.
4: On the upper body rigth side next too the fuel inlet there is a idle passage plug. This should be screwed all the way in. But if idle circuit is running ruff, then remove and clean passage with Chemtron Berriman B-12.
5: Inside of lower bowel left side is a idle jet metering screw, so that should be cleaned upon rebuild.
6: On lower right side is a pin, ball,and spring used to set tension on the choke butterfly and used as a dent setup to hold the choke open.
Thats all I can see in the diagram and should be a complete adjustment. Let me know if you need more help!