OK, for our trucks you can use lowering spindles in the front OR the cheaper route is drop coils. All options for the rear of the truck is just a flip kit.
It doesn't matter on the motor, I promise. Some sites just have their parts system set up a certain way and it may not have your motor selection on there in the cross reference system. But I
PROMISE it doesn't matter what motor.
The newer 4th gen rams have coils all around instead of leaf springs in the back, that is why their kits are somewhat cheaper. The 3rd gens have to have a flip kit in the back and coils/spindles up front.
02-05 Kit w/ coils
Kit with spindles