6bt and 4bt

I'm a student in High school planning on buying a K20 this year, but I'd also like to swap a Cummins in it. I don't have a lot of fabrication experience but I do have the people and resources to help me out. This will be my first truck and first swap. Since my budget is tight I thought of doing...

Question, Will a front gear cover from a 6BT fit on a 4BT? Other questions to think about what else will interchange?