2005 dodge ram 3500

05 dodge with 5.9 Cummins Laramie. Truck has around 600,000. Swapped the motor out 2 years ago the motor has around 310,000. Has new rad, alternator, water pump and turbo has had new shocks and brakes in the rear but haven’t done the fronts. Shut it off and it wouldn’t start again took it into dodge dealership they say it needs all 6 injectors have had it running with quick start but it struggles. Don’t have the time to put into it so it’s time for it to go