Update...
I got the injector pump back together, installed and bled. This was pretty simple, don't be intimidated.
Replaced the glow plugs with NGK 2031 (Y-103V).
Installed new China gear reduction starter.
Brazed the leaking radiator.
Engine starts and runs great.
After 2-3 minutes of running, it is in the overheating range on the gauge.
When I pulled this into the shop I drained what little antifreeze was in it. I then pulled the radiator off for repair, pulled the hoses and flushed both of those and the block with a hose. I got a lot of nasty rust out of the block. Look how this lower hose was clogged with rust and crap.
Attachment 112055
The bypass nipple on the water pump was clogged also. Then I found the thermostat was missing. Now I'm pretty sure the PO had an overheating issue too.
Here is where I'm at now. Even with no thermostat in, it still over heats. It's almost like I'm not getting enough flow through the engine. The water on top of the radiator was only around 105 but the gauge was almost to the far right.
I ordered a new "el-cheapo" water pump for some testing to see if my existing impeller has corrosion causing poor flow.(I doubt that is the issue)
https://www.amazon.com/AULINK-15534-...ps%2C97&sr=8-7
I'm also thinking about adding some of this to the cooling system to see if it will help.
https://www.evapo-rust.com/crc-thermocure/
Do any of y'all have any suggestions? TIA