Good progress
Hi Scott
Thanks for the progress update.
When you install the new or old throttle pivot shaft remember that it goes through into the water jacket so you want to use a good hard set sealant and a star type lock washer. After a rebuild on my C60S years ago I had the pivot unscrew itself and fall out first sign of the problem was the engine went to idle I pulled over and the truck was peeing antifreeze on the ground.
The bolts that hold the camshaft retainer should come out with a fairly small force small socket on a 1/4 drive should do it.
My HUP shocks were like yours when got it back in 1978 every now and then I have checked them to see if like your they have resistance in both directions through the full sweep. Back then I had an old timer tell me that if they didn't get sloppy or weak at the end of the stroke don't do anything. Modern hydraulic shock fluid may not be compatible with the seals. So I have left mine alone and they still work.
They work enough that the only problem I've ever had is eventually braking the welds on the shock links. In each case remove the link reground the weld and rewelded them. Luckily mine are the all metal ends on the links.
Cheers Phil
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