Not sure what you are comparing in your reply Sin5, Body panels would be the same between the 2002-2006 AV 1500 v. 2500 EXCEPT where the frame is mounted to the body,(some difference between cladded and wbh models) since there is a difference in the two frames they will have different mounting points. Then if you are looking at model years 2007 to 2013 there was no 2500 AV so again body mounting points to consider on a swap.
As posted by ygmn back in 2012 almost anything can be done with enough time money and skill.