1963 f250

I am planning on putting a cummins out of a gen one dodge in my grandpaws 1963 Ford F250. It has a straight 6 with a 4spd tranny now. I going to up grade the rear axle to a rear end out of a friend of mines 89 f250. I plan on using the auto out of the dodge cause I think the standard will add more work than is needed for this project. Only thing I have not got figured out is installing power steering and power brakes. It does not have either right now.