1600 is a fair price for new injectors. You might be able to find them as cheap as 1500 but that would be about it. Your truck will have AB code injectors and no long lead on number 8. You can put the AD injectors in all 8 OR put 7 ADs in and the AE in in the number 8 if you want. If you have a chip or plan to get one I would get the AC single shots. The will require some tuning to go from a split shot to a single shot (it will run with out tuning) but the injectors are the same price and you can get better mileage with the single shot, and the AC is capable of more power. If you went with the AC you would use all 8 ACs. A good quality rebuild is about as much as a new injector so I would go new but if you must save money you can get "budget" rebuilds, or rebuild your own. Check out Rose wood diesel, swamps, beans etc... for pricing. Where did you get the 1600 price for the new injectors?