1980 300TD will not start

After a cold night(I forgot to plug in the heater), the engine will crank
but not start. Replaced fuel filters, tried Diesel purge from bottle, even
starter fluid. Nothing worked.......any ideas.

Glow plugs, alternator, battery, valve adj. in last yr. Timing chain replaced
at 130K. Car now has 340K. Compression check @ 290K: 340,350,400,360,380.

It was the uplift pump.

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