[93M6Formula]

I'm honestly surprised the glowplug switch works, the 82-84 system wasn't very reliable. But anyway, hard to say how good the fuel is but I've started a 6.5 on 10 year old fuel before. I would personally run a line off the firewall mounted filter into a jerry can to be sure. You may need to do some air bleeding so be prepared to use a battery charger and DO NOT use starting fluid. And check oil level obviously.

First make sure fuel comes out of the bleed valve on the primary filter, once that's good, you may need to crack one of the lines on the secondary filter behind the intake until no air comes out. Then crack a few injector lines and see if you have fuel dribbling out while cranking, if yes, you're ready to start. Also note, since you'll be doing the bleeding by cranking due to having only a mechanical lift pump, be sure to give the starter a rest and only do 10-15 second max cranks, especially if it's an original direct drive starter. Check to make sure the front starter brace is in place also so you don't break the ear off the block and/or ruin the bolt threads.