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Personally, I would replace the o-rings with OEM "Allaint" only and ensure that the injectors are properly torqued upon install and see if that cures the problem. Alliant Injector O-rings - Ford 7.3L Powerstroke (94-03) About $60 as opposed to $1650. NEW STOCK INJECTORS All of your symptoms can be caused by loose injectors and/or bad o-rings.
If you do not have an injector puller, you can disconnect the rail manually. You can use a typical wrench to remove the fuel rail since it is held by screws and bolts. Once you get the screws and bolts out of the way, you can easily pull the fuel lines and rails off. Pull off the fuel injectors.

Brian from Sea Foam shows a super easy, fast and effective method for cleaning diesel fuel injectors, chamber areas, and compression rings using Sea Foam Mot

Step 4. Slip the injector nozzle protector onto the injector tip. Slip the injector gasket onto injector tip. Insert the injector into the injector hole in the head. Install the hold down collar onto the injector hold down studs. Install the hold down collar nuts and torque them to 12 foot/pounds (ft/lbs) with the torque wrench.
Service type Fuel Injector Replacement: Estimate $2467.19: Shop/Dealer Price $3070.26 - $4856.92: 2015 Chevrolet Silverado 2500 HD V8-6.0L: Service type Fuel Injector Replacement: Estimate $1277.35: Shop/Dealer Price $1577.43 - $2446.19: 2011 Chevrolet Silverado 2500 HD V8-6.6L Turbo Diesel: Service type Fuel Injector Replacement: Estimate
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how to change diesel injectors