Help a 60-66 guy out..!

[**grumpy**]

Im usually on the 60-66 side but my buddy just bought a 59 Chevy shortbed fleetside.
Hes limited in funds and ability, but wants to get rid of the straight axle.
Whats the easiest, least expensive option for him?

Hes working in a one car garage, with no welder and usual basic tools. I know Im asking alot, but I told him Id ask.

Plus the goofball wants to sell his fleetside bed for a stepside!?!?? Im trying to talk him out of that...