Kitbashing an N scale Bachmann dash-8 40cw with kato parts?

Hi guys I was looking to see if anyone has any ideals about converting an old N scale dash 8 from bachmann with parts from kato. Let me know if you have suggestions on what parts would work because I would like to keep the dash 8s in my locomotive roster. Thanks.

What are you converting on the old B’mann??

This may sound silly but I want to convert the entire thing except for the locomotives shell