Diesel Newbie ?

[Redrock240g]

I have a couple of questions re an old OM616.

I have an old 616 that I believe was transplanted into a 240G. The engine designation appears to be 616.934.-10-0362xx which I could not find source info on. What was the original application for this engine?

So here are my challenges, This vehicle was parked about 10yrs without starting. I was in a very dry climate (AZ) and might have have Bio or some veggie as the fuel is very thick and smells a little like varnish?

Anyway, diesel newbie got it running but very rough. I then changed the fuel filter (incorrectly) in think I introduced air. I then tried to bleed but the hand pump is dead....

So I would like to rebuild the fuel/lift pump (FP/KG22M101), replace the hand pump (Bosch or the Monarch), and clear the old fuel from the system.

At some time after that I will base line all fluids and lines.

Does this sound like a reasonable plan? What else should I consider doing? RE the lift pump, there is a lot of info but I haven't been able to find a rebuild kit. It looks like 2 valve and some O-rings and maybe a gasket (2 bolts) and crush washer, can this be sourced complete?

Should I remove teh hard lines and make sure they are clear?

TIA