All glow plugs test good. Voltage to gp's when ignition in glow plug position. New alternator. Cleaned battery terminals. Cleaned terminals that are on the body under the air intake. Battery tests good at local auto store. Cleaned the ground wire. Valve adjust 5000mi ago. Replaced primary fuel filter.
Im at a loss for what to do next. Any ideas.

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84 300SD 274K
38K miles on flatplate heat exchanger and various diesel/veg blends. prior to that 4K miles on unheated veggie blends with kero and DinoD.