I obtained another new HH which just arrived. I got everything back together today and started it up. It ran fairly nice for a bit and then would not idle again. Perhaps air in the system. I set the throttle and took a look. Then I noticed a decent size leak around the HH area. I shut it down and was so frustrated I just put things away and tomorrow I'll start it again and try to determine what is leaking. It might be the brass fittings I transferred over from the old HH. I used a small amount of TFE paste on the male threads of both brass fittings. It could also be old hydraulic line fittings at the HH. I had to replace the #2 line because it had been cross-threaded at the injector and was ruined. Yes, I did that, but I believe it was already cross-threaded before I removed it. Maybe in an army shop years ago or maybe the last time I tried this two years ago. The female threads of the injector are not damaged, so the line male threads must be softer steel.
By the way, what worked really well for me when lining up the red tooth and installing the shut off shaft in the side of the HH was a small rectangle mirror with a telescoping handle that I could position so I could see the side opening of the injector. It also helped when installing the linkage and Jesus clip. The view is upside down so you have to move pliers, linkage or whatever in the opposite direction that your brain is telling you to do. I got used to that after a few minutes of frustration. I put a few rags below the linkage in case I dropped the clip and sure enough it went on the linkage the first try. I did drop one of the two screws for the side cover and the rags caught it, so it is a good idea to position a rag "trap". Experienced mechanics probably know all this but I'm posting it for the miserable wretches like me who are new to multifuel mechanics. I will let everyone know what happens tomorrow.
And bonus! My engine oil is contaminated with diesel so I have to change oil I just changed two years ago and never used. Sigh.