This swap is possible, although it won't be a straight "plug and play" application.
No, they are not interchangeable.
235
2002-2005
A 2004 Ram does not have a timing belt.
8
Pull the gas tank and replace the pump.
Front of the engine, the fan screws onto it.
The fuel pressure for a 2004 A Dodge Ram truck with a 1500 5.7 liter engine should run around 47 psi( pounds per square inch). If the fuel pressure is low you might hear grinding or noisy engine.
They are under the coils, which are located next to the injectors.
It will tell you in owners manual, look for capacities in the index
YES
Yes.