I have a 77 f150 with a tired 351m I am getting a 79 bronco with a built 400 I am sure I am going to put the 400 in the f150.

What else should I transplant from the bronco to the f150 to make it better?
I need some measurements I know the wheel bases are different but I want to put the bronco body on the f150. I know I will have to extend the body/do a graft. Possibly use a crew cab to make up the extra space.
I could use some body frame measuements so i can dream. I dont wan't to change the frame.
bronco Back of wheelwell to bumper?
Overall length of bronco body?
Length of crewcab bumper to back of cab?
Or advice from someone that has done this.
Thanks,
Jason