05 hemi swap

[shaddyratt]

i'm changing 05 dodge ram hemi engine and replacing it with 08 dodge ram hemi engine, what do I have to change? I'm pretty sure the ecu is different

 

[RonJon '06]

The way I understand it if the '08 is from a 1500 then it will have MDS lifters and solenoids. If it's from a 2500 then I believe you can just drop it in and get a wiring harness adapter since the coil packs and fuel rail are different than the '05. If you change the PCM then it will not work with your instrument cluster unless you get it VIN flashed at the dealership.