The first thing you need to know is; what is the condition of my engine?

Do a compression test, don't guess. From what you posted, you've never seen the car run, yes?

You're looking for a MINIMUM of 250 P.S.I. across the board. This is not a good reading (should be in the 300+ P.S.I. range) but can be expected for an engine which has sat idle for a long time.

Remember the rules for a 4 stroke run cycle. "Suck, SQUEEZE, bang, blow". The "squeeze" is the most important part of the diesel equation. If you can't compress the fuel mixture hard enough you won't get ignition.

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“Whatever story you're telling, it will be more interesting if, at the end you add, "and then everything burst into flames.”
― Brian P. Cleary, You Oughta Know By Now