I'm trying to figure out of I can install the Mishimoto radiator made for the 04-08 Hemi into my 2003 with a 4.7L

Biggest difference is the fill neck/rad cap on the Hemi version and also the coolant tank/degas bottle difference.

 

To answer my own question. I did some more research and realized that I can do this by:

1. Installing the 2004+ hemi coolant reservoir

2. Replace a few coolant hoses (Dayco 87825). This eliminates the "T" hose that comes from the original 03 coolant reservoir

The fan shrouds appear to be the same part. After doing these things I'd have a everything I needed to just drop in the Mishimoto radiator.

 

So I think I can do this by swapping over the coolant reservoir and a few hoses from the 5.7 into my 4.7. The radiators are identical other than the fill neck/rad cap.