It is NOT the same.. The 5.2 is the old Magnum series and is based on the really old 318 motors which started back in the early 70s.
The 4.7 is known as the "baby hemi". The only things it has in common with the 5.2 is that it has 8 cylinders and runs on gas.. That's pretty much it. If you're gonna go all that work, why not do the 5.7 hemi.. It's the same amount of work to get it in and functional. The only difference may be the cost especially if you are getting the little motor free of really cheap..
The 5.9/5.2 conversion is actually the simplest swap to do. Lots of common parts between the two and it will be cheaper to finish than any other V8. Time to google and start your research
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