What parts would I need to put wheels from a 2003 Fatboy on to a 2007 Heritage Softail Classic?

 

Has been done!

https://www.hdforums.com/forum/softa...e-softail.html

 

 

I would go to the thread I provided above and post your question.

Part numbers for the 2003 Fatboy are here http://partsfinder.onlinemicrofiche....INJECTION)-(BX)

 

I swapped my rear spokes for a solid fatboy rim (loose spokes drove me nuts) and it was a direct fit. 2003 Fatboy rim onto 2000 Heritage.